Jennifer Rose Horton was born to Bill and Laura Horton on September 11, 1976. She has an older brother Mike Horton, and a younger half brother Lucas Roberts.
As a teen Jen was rebellious and reckless, but with the help of her brother Mike she finally settled down and moved in with Tom and Alice.
In 1986 Jen was in high school, and began seeing Glenn Gallagher. Glenn was a high school jock, and Jennifer's boyfriend. Glenn was pressured by his team mates and his coach into doing steroids, but Glenn refused. When he tried to reveal his coach to the police his girlfriend Jennifer Horton accidentally tipped his coach off to the plan. Glenn was lead into a trap by his coach, but was eventually rescued by Jennifer and her friend Frankie.
Glenn's constant pressure on Jennifer to have sex with him lead to their break up. Jennifer then began to see Frankie Brady. When Jen's father Bill returned to Salem and tried to put an end to Jen and Frankie's relationship Jen became engaged to Frankie to spite her father. However, when Jen learned both her mother and grandmother were schizophrenic she thought she or any children she had might contract the condition, so she broke off her engagement to Frankie.
Frankie and Jen had their share of problems, and Eve Donovan was one of them. Eve was in love with Frankie and wanted him for herself. While Jen and Frankie were apart Frankie had an affair with Paula Carson, the women who ran the Teen Crisis Hotline Frankie worked on. Eve learned about the affair and exposed it after Jen and Frankie had reconciled, causing more trouble between them. Frankie eventually left Salem by the 1988.
In 1989 Jennifer began to see Emilio Ramirez, much to her family's dismay. When Emilio was accused of attempting to murder Justin Kiriakis he fled Salem. Jennifer also began a job at the Spectator as part of her college education. She also befriended a homeless girl named Sally who was pregnant. Sally had been arrested because she didn't want to give birth to her baby on the streets. In an attempt to help Sally Jack and Jen pretended to be married and they provided a home for the baby. Caught up in this fantasy world Jack and Jen fell in love. Emilio eventually returned and Jack and Emilio were rivals for Jen's heart. Things became even more complicated when Jen's cousin Melissa came back to Salem and was determined to keep Jen away from Jack.
Melissa pushed her cousin away from Jack and into the arms of Emilio Ramirez. Jennifer and Emilio were set to marry, but Jack wouldn't allow it. Jack kidnapped Jennifer on her wedding day to prevent the marriage from happening.
Still without the diary of his late wife Loretta, Ernesto planned a cruise in which he plotted to pay back all his enemies and recover the diary. Ernesto invited Roman II/John Black, Isabella, Victor Kiriakis, Julie Williams, Jack Devereaux, Jennifer Horton, and Bo and Hope Brady. Onboard the ship, Ernesto was reunited with his daughter Isabella. Their host was a mystery to all but Victor, who knew Ernesto well. Deciding that the truth had to be known, Jack returned the missing pages of Ernesto's diary to Isabella. Isabella learned that she was Victor's child. Isabella told this to her father and then confessed to killing Marina. Ernesto claimed he did not love her any less, but secretly he despised her and felt she truly was the daughter of Kiriakis. Ernesto escaped his ship with Isabella and fled to a nearby Island. There he held Isabella prisoner and slowly poisoned her as he had done to her mother. A bomb exploded aboard the cruise ship and miraculously the passengers found their way to the island. On the island, Jack and Jennifer made love. Roman II/John Black sought to find Isabella because he knew she would be in grave danger. John and Bo set out to search the island and Hope followed Bo against his wishes. John made it to Toscano's house and rescued Isabella. However, Ernesto had captured Hope and was holding her prison. Everyone was lured to a cave where Ernesto held Hope with him in a cage that suspended a vat of acid. Ernesto offered Bo the chance to save Hope if he could convince him that she should be spared. Bo made a moving speech to Hope, but it failed to move Ernesto. Suddenly and explosion occurred which sent the cage crashing down into the vat of acid. Both Ernesto and Hope vanished and were declared dead after hours of searching the island. Shane eventually arrived and everyone was escorted back to Salem.
In 1990, Jennifer was reunited with her teenage friend Katerina VonLeuschner, who was now going by the name Carly Manning. Jennifer Horton and Katerina were in boarding school together. Lawrence and Katerina were supposed to meet for the first time when they were teens, but Katerina talked Jennifer Horton into taking her place. When people came to Salem looking for Katerina, Jen stepped in and posed as Katerina again. Jen believed that after the phony marriage occurred, she'd be allowed to go free because all Lawrence wanted was the money. Jennifer, along with Alice who was posing as Cecily Smith, flew to Alamainland. There Jen was to marry Lawrence. Alice attempted to escape and get help, but Lawrence caught her and imprisoned her. Jen and married Lawrence, who knew all along that Jennifer was not Katerina. Lawrence raped Jennifer on their wedding night and held her prisoner. Jack Devereaux came looking for her and ended up being imprisoned in a cell next to Katerina's brother, Francois. However, Francois was really Frankie Brady. Jack and Frankie escaped and managed to find Jen. Frankie had told them that Lawrence was holding him prisoner and was going to trade him to Katerina for the VonLeuschner fortune and Bo Brady. Lawrence's plan failed and he set of an explosion which caused a chain of earthquakes trapping them all underground. Leopold helped them escape, but in the process he had a heart attack and died. Alice Horton suffered a stroke after returning to Salem and required surgery.
Jack had proposed to Jennifer during the cruise of deception and had given her a shell ring he had crafted. After rescuing Jen from Lawrence, Jack was eager to marry Jennifer. Jennifer, however, remained distant from Jack. In an attempt to bring them closer together the two went to Smith Island. When Jack initiated a physical relationship, Jen slapped him and called him a rapist. Jack was devastated and broke it off with Jen, who had not told anyone that Lawrence had raped her.
In 1991, Brian Scofield found himself investigating Nick Corelli's murder as well. Brian & Melissa, Eve & Frankie, and Jack & Jen boarded a theme train on which Johnny Corelli had stashed the weapon that was used to kill his brother Nick. When they found the weapon, Johnny Corelli detached the car they were in and it rolled down a mountain pass and derailed into a cold forest. The couples split up and all tried to find their way out of the valley they found themselves trapped in. Eve eventually split away from Frankie and met up with a young woman named Molly Brinker. Molly drew Eve a map and Eve lead the party to a safe location and took the credit on her own. A helicopter retrieved the stranded Salemites, but Eve was seriously injured when she fell from the helicopter ladder. She lived and was treated like a star in Salem until Molly showed up and pushed Eve off of her heroine pedestal.
Jennifer eventually admitted to Jack that Lawrence had raped her. Jack supported Jennifer when she pressed charges against Lawrence. Lawrence claimed that he had suffered blackouts since he was a small child and didn't recall raping Jennifer. However, Kimberly Brady found a secret room in Lawrence's house and found Lawrence privately confessing raping Jennifer on a videotape in the room. Kimberly allowed Jack to find the room and the tape and Lawrence was convicted and sent to prison.
On July 2, 1991, Jack and Jennifer were married in a rowdy wild-west show arena. After the marriage they spent their honeymoon at Universal Studios in Hollywood. There they caught the eye of a con-artist named Hawk Hawkins. Hawk learned that the couple had ample cash and he followed them back to Salem. (Here is where I need help). Hawk, along with his partner Desiree, convinced Jack and Jen that Desiree could tell the future. While Hawk was at their place one day he claimed to have thrown his back out at Jen and Jack's place. Fearing a lawsuit, Jack allowed Hawk to move into their penthouse. Meanwhile, Desiree told Jack that the FBI was coming for him, which caused Jack to go on the run. Hawk then managed to get his hands on Jack's money and forced Jack to flee Salem. While Jack was gone, Jennifer had to use her trust fund to save the Spectator from going under. In the meantime, Hawk contacted Alston Hawkins, his father?, to come to Salem and help him get away with Jack's money. Hawk also planned to take Jennifer with him.
Jack eventually returned to Salem and conned Hawk into admitting he stole their money. Hawk was sent to jail along with his accomplices, but Jack and Jennifer were broke. To make matter worse, Jennifer learned she was pregnant and Jack thought his Hodkins disease had returned. Jack sold the Spectator to Julie Williams in order to provide for Jennifer after his death. Jack was eventually convinced that he wasn't dying. Jen's father, Bill Horton, gave Jack and Jen a house on Coperlantern road and they moved in. On October 19, 1992, Jennifer gave birth to their daughter, Abigail. Jen took a job hosting a talk show with Calliope and Jack worked as a freelance reporter.
Jack eventually lost the Spectator to Victor Kiriakis and his new wife, Kate Roberts. Jack was furious and wanted revenge against Victor and Kate. Jack's daughter, Abbey, was diagnosed with aplastic anemia. Jack began investigating Victor, who he was sure was the person who dumped the toxic waste which caused Abbey to become sick. The waste penetrated into the ground water that fed into Jack and Jen's house. When Jack confronted Victor, Jack learned that he was the one who ordered the dumping of the toxic waste in his youth. Back when Jack was a naive politician, Jack had signed numerous papers without even reading them, one of which gave his father, Harper, the permission to dump some toxic chemicals an area aways away from where Jack was currently living. Feeling like a failure, Jack left Jen a note explaining what he had done and he left town. Later, Jack served Jen with divorce papers.
Jen soon began dating Peter Blake, despite the objections from her family that he was a DiMera. The two soon fell in love. Peter realized that he had to rid himself of his old ways and planned to sell a club where he had been trafficking Drugs.
Later in 1994, Kristen, Tony, Peter, Jen, Bo, and Billie all came to Maison Blanche for a charity event Kristen held. While there, Jen and Peter made love. Also, Billie saw a woman who looked like Bo's dead wife Hope, but nobody would believe her. Hope was at Maison Blanche, but she was called Gina by Stefano and Celeste. Roman also showed up, but to arrest Peter Blake for trafficking drugs in one of his clubs. A jealous Celeste leaked gas into the cell where John and Marlena were being held and started a fire. Roman managed to rescue them. John came out and shocked both Kristen and Tony, who were horrified to see John in shackles. Kristen looked up and screamed when she spotted her dead father, Stefano. Tony ran back into the house to try and retrieve his father's computer, which contained a file on John's past. Maison Blanche burst into flames. Tony got the computer, but went blind in the process.
Laura Horton spotted Peter talking with a man on the docks and Peter feared that Laura would eventually learn that the man was a drug dealer. Peter enlisted the aid of Daniel Scott to gaslight Laura. Daniel dated Laura and even had her office repainted. However, the paint was toxic and it caused Laura to become drowsy. Using a speaker built into a souvenir bust in Laura's room, Peter made Laura believe that he was planning on killing Jennifer. Laura looked like she was going insane and was going to be re-committed to an asylum. Afraid, Laura ran away and hid out with Vivian's help Peter's plan failed when Jen fell asleep in her mom's office overnight and became convinced that foreign troops were invading America (or some whacked out story). Jen had actually heard a story on the radio and became confused. Laura returned to the hospital after Jen was admitted. When she was spotted, Laura fled and ended up trapped on a faulty fire escape. Jen came after her mother and ended up trapped as well. Peter eventually rescued the two and came off looking like a hero. Mike had Laura's office analyzed and they blamed Laura and Jen's hallucinations on the paint. Daniel Scott left town and Peter decided that Laura was no longer a threat.
Jack Devereaux returned to Salem in 1994 and moved back into his house, because he still owned 50% of it. Jack was hell-bent on breaking up Peter and Jen, but Jen assured him that she loved Peter and was going to marry him. Jen decided to attempt to find the man her mother fell in love with at The Meadows, not knowing it was her ex-husband Jack.
Peter took Jennifer to his home town of Aremid where he proposed to her. There they learned about the legend of the Woman in White, a ghost who haunted the town. Peter thought it was rubbish, but Jen wasn't sure. Jack showed up in hopes of thwarting Peter somehow and he befriended a young girl, Sarah, who helped her uncle run the local pub and in. Sarah knew much about the Woman in White and she also wanted to help Jack. While staying at the Blake House, Peter and Jen found a portrait a Woman in White who was actually Peter's mother, Rachel. Jen made a fire and fell asleep at the Blake house and the Woman in White closed the flew and filled the house with smoke. Jen was rescued by Peter and Jack, but Sarah said it was the woman in white. Sarah fell in love with Jack and actually dressed up as the woman in white to get close to him, but she was found out by Peter. Peter and Jen both thought Jack was using Sarah to try and break them up. Peter and Jen went back to Salem, but Sarah told Jack that there really was a Woman in White.
Jennifer returned to Salem with Peter, but they soon returned to Aremid for their wedding. As a surprise, Jennifer had her wedding dress designed after the dress the woman in the picture they had brought home was wearing. Jen was torn in her decision to marry Peter because she still had some feelings for Jack. However, Jen soon found her mother and Jack in bed together kissing. Laura and Jack admitted their affair at The Meadows to Jen, who was crushed. Peter was their to support her, even though he had planned for Jen to find out the truth. Jen, hurt by her mother and Jack, went through with her wedding to Peter.
The pavilion where Jen and Peter were to be married in caught fire and Jack was unconscious within it. Peter managed to save Jack. Jack was locked in jail accused of arson, but was later released when it was proved to be an accident. While in jail on November 21, 1995, Peter and Jennifer married.
After Peter and Jen's wedding, Tony DiMera was tragically murdered. John Black became the accused and Peter was named the prosecutor. Jack and Jen were convinced of John's innocence and when Jude StClair attacked Hope in Aremid the two thought he may have killed Tony. Jack and Jen returned to Salem and went undercover into the Blue Moon. Just as they were about to find the evidence linking Peter to Jude, a police bust occurred. The evidence was taken to the police station and when it was about to be opened, Peter managed to have it permanently sealed.
When Jude is spotted in Aremid, the search is headed up by Jen and Jack. Jen comes across Jude, who swears he did not kill Tony. Jude captures Jen and holds her hostage in a warehouse. Jack finds Jude later on, but he lets Jude go because Jude tells Jack that only he knows where Jen is and without him, Jen will starve to death. Jen eventually escapes, but before escaping she finds a matchbook that has some numbers written in it. Jen pockets it, not knowing that it is the number of a bank account that Peter has stored some money in for Jude to pick up. Later, Jen gave the matchbook with the bank account numbers to Jack and she learned why Jack let Jude go. Later, Jack learned that the numbers were for a bank account. Jack and Jen traced the bank account to the Cayman Islands and they went there and posed as tellers in training. Peter learned what they were up to and managed to erase his name from the bank account just as Jack saw it coming onto the screen. Peter also turned them in and the bank manager through them out, so they returned to Aremid.
John Black's trial resumed and Peter continued to prosecute him, but when evidence proving John's innocence showed up, John was let go and Peter apologized to John.
Peter and Jennifer flew to Paris when they learned that Kristen and Rachel were caught in an explosion.Jack came to Paris as well, hoping to help his friends and find dirt on Peter. Jack and Jen decided to try and find Stefano's lair in the underground. Jack found some books with Peter's name in them, but at the same time Peter set off charges to destroy what was left of the tunnels. Jack and Jen were caught in the explosion, but managed to escape. Jack learned that Daniel Scott is also in Paris and lures him into a high-priced poker game. When Daniel couldn't pay his debt, Jack paid it for him in order for the goods on Peter. Daniel confessed everything and Jack told Jen the truth about Peter. Jen didn't believe Jack, but Laura came forward with what she knew about Peter as well.
After returning to Salem, Peter brought Daniel Scott to Salem and had him tell Jenifer that Jack made up all the lies about Peter and he was forced to go along with Jack because he needed the money. Later, Jen sees Peter talking with Daniel in Salem Place. Jen attempts to get the truth out of Daniel, but he won't talk. Jen tells Daniel that she already knows everything and was just testing him. Daniel believes Jen and tells her everything, including how they gaslighted Laura. Jen returns home and kicks Peter out of her house. Jack planned to leave Salem, but he felt that Jen and Abbey were in danger from Peter. Jack did some investigating and learned that Peter was planning to kidnap Jen. Jack attempted to get the police department's help, but they were unable to do anything. After purchasing gun, Jack headed over to Jen's place. Upon arriving, Jack found Peter creeping up the stairs with a syringe in his hand. The two fought and Jack's gun went off. Peter was rushed to the hospital, but died later on. Jack was arrested for his murder and Jen bailed him out.
Jack went to trial for Peter's murder and thanks to Stefano's blackmailing of the judge, Jack was sentenced to life in prison. Later, Trent Davis moved next door to Jen. Unknown to Jen, Trent was Jack's ex-cellmate Travis, who was working for Stefano. Because Laura's ramblings about Peter appeared to be true, Jen feared that Peter may come after her again and she asked her neighbor Trent to install and alarm for her. Trent did so, but he also knew how to bypass the alarm and break in.
Jack's retrial began and everyone had renewed faith that Jack would be set free because Peter was alive. Kristen DiMera agreed to admit that Peter was alive, but she lied on the stand after she saw Stefano staring at her. Jack was sent back to prison because there was no way to prove that Peter was alive.
Jennifer decided to apply for a job at the prison Jack was in and used Hope Brady's credentials to get the job. Jack tried to talk Jen out of the job, but she was determined to help him write and expose on the prison system. While in prison, T.C., a crooked guard assigned to watch Jack, takes a liking to Jen. Jen broke into the warden's office to try and get a computer password for Jack and she was caught by T.C. T.C. attempted to rape Jen, but Jack saved her when he convinced another prison guard to take him to the warden's office. T.C. payed Jack back later by beating him up in his own cell, unaware that Jen was hiding under Jack's cot because she hadn't gotten out before lockdown. Later, Travis/Trent and T.C. searched Jen's house and learned that she was posing as a guard at the prison. Jen was fired and as a result, all of Jack's visitation and phone calls were limited to his lawyer, Mickey.
Stefano announced that he wanted to become a respected citizen of Salem, secretly it was all a part of his master plan. Jennifer confronted Stefano and told him that he would need the Hortons to back him if he wanted to become a respected citizen of Salem. Jennifer warned him that if any harm came to Jack then he would not have the Hortons' backing. Stefano called T.C. and told him not to harm Jack Devereaux. Unfortunately, Travis and T.C. had pinned Jack under a press, which would smash his head flat. Luckily, T.C. and Travis stopped the press in time before it killed Jack. Jack realized that someone wanted him alive and realized that T.C. must be on Peter or Stefano's payroll.
Jennifer had gotten the password for the warden's computer, but was unable to give it to him before she was fired. However, Jack's new cellmate, Herby, had a girlfriend on the outside that got the password to Jack. Upon using the password, Jack learned that his old cellmate, Travis, was really Trent Davis, Jen's next door neighbor. By the time Jack could get word to Mickey, Trent had already kidnapped Jen. Trent held Jen hostage in a seedy motel and told her that Peter was coming to get her and was going to pay him a lot of money.
Upon hearing that Jen had been kidnapped, Jack broke out of prison with the help of his cellmate, Herby. Jack learned that Trent was taking Jen to the Grand Canyon and headed there.
Trent and Jen made it to the Grand Canyon and Trent held her hostage in his families cabin. There, Jen learned that Trent brutally murdered his won parents. Meanwhile, Jack also made his way to the Grand Canyon and had to punch out a Park Ranger, who was notified that Jack may show up. Jack climbed the cliff to Trent's cabin and when Jack and Trent fought, Trent fell off the cliff to his death. Jack and Jen returned to Salem, as did Peter. Jack and Jen spent Christmas with their family, but Jack decided to sneak away and try to catch Peter. Laura provided Jack with a car and he took off, and Peter followed him. Unfortunately, Jen and Abbey stowed away in the car with Jack.
Jack, Jen, and Abbey went on the run and ended up in a seedy motel. Peter was hot on their trail and also ended up in the same hotel. Peter tipped the FBI off to Jack's whereabouts, but Jack managed to escape. However, Peter was found by the FBI. Peter attacked an agent during a Jungle Madness attack and ran off. Jack and Jen ended up joining the Ward's World Famous Circus, owned by Jasper Ward. Jack confessed his problems to Jasper, who understood and still gave Jack a job as an animal keeper. Jen got in on the act and replaced the woman who Ernesto threw daggers at. Even Abbey joined the circus as a clown.
Peter returned to the DiMera Mansion and Stefano helped him try to locate Jen and get a cure for his jungle madness. Stefano came up with the idea of planting a listening device on Laura, who they suspected knew where Jack and Jen were. Laura Horton, Maggie Horton, and Celeste Perrault all went to the Salem Spa for some relaxation. Peter disguised himself as a masseuse and planed to plant the device on Laura, but almost killed her during another Jungle Madness attack. Later, Laura set a trap for Peter by inadvertently hinting that Jack and Jen were in Dayton, Ohio. Kristen overheard Laura, who told Peter. Peter raced to Dayton, Ohio, as did the police who Laura tipped off. Unfortunately, the circus Jack and Jen were hiding in was in Dayton, Ohio. Jasper covered for Jack and Jen and Peter returned home when Stefano warned him the entire thing was a trap set by Laura.
The circus Jack and Jen were hiding out in was on the verge of going broke. Jack convinces Jaspar Ward to take the circus to Salem, Jack had a plan to trap Jennifer. Upon arriving in Salem, Jack sent Hope some tickets and asked her to come to the circus. However, Peter followed Hope and attacked her, but she was saved by Bo. Peter tipped the FBI off to where Jack was hiding and he was arrested. Peter kidnapped Jen, but also attacked her and knocked her unconscious. When Jen came too she fled. Jen hoped in Jasper's car and took off and Peter followed her. Jen's car eventually went off the road and exploded. Peter stopped at a phone booth and found Jasper Ward calling the police to report news about Jennifer, but Peter attacked him and put him in a coma.
Jack was placed back in prison and Laura came to see him. Earlier, Laura confronted Kristen and vowed to find Peter and make them both pay. After leaving, Laura realized she had lost her prescription of Placiden, unaware that Kristen had found it. Laura told Jack that she had bought a gun and was going to take care of the DiMera. Later, Abe came to see Jack to tell him that a woman's body was found in the car Jen was driving. Jack refused to believe it was Jen, until they showed him a necklace Peter had bought for her that was found in the wreckage. The necklace had an inscription from Peter to Jen. Jack and the rest of Salem were forced to admit that Jen was dead.
Jack was let out of jail to attend Jen's funeral. Laura slipped out of the church to find Kristen and make her pay. Peter showed up with a shotgun and started shooting. Suddenly, Jen's spirit rose from her coffin. Jen convinced Peter to turn himself in. Jack was released from prison immediately. Jack and Abbey returned home to find Jen standing in their home. Jen explained that her death and her resurrection were faked by the people at the circus. Jen told him that Jasper was supposed to tell them all, but Jen wasn't aware that Jasper was in a coma. Jack, Jen, and Abbey all went to the Brady Pub and they celebrated the fact that Jen was alive. Later, Jasper came out of his coma.
Peter was taken to jail and Stefano gave him the cure for his jungle madness. Peter asked Stefano if he was going to break him out, but Stefano told him that he couldn't do that because it would ruin his new reputation as an upstanding citizen of Salem. However, Stefano did manage to get Peter placed in a white-collar- crime prison instead and he would be up for parole in a few years.
Jack, Jen, and Abbey all left Salem in June of 1998 for a vacation in Africa.