Lauren Fenmore, the beautiful heiress to the Fenmore Department store chain, lost her first husband, Dr. Scott Grainger, to Sheila Carter, the conniving woman who stole Lauren and Scott's newborn child Scotty, and substituted him with a black market baby, Dylan, who died a crib death. Then after Sheila's deeds were finally exposed and Lauren and Scott were reunited, Scott died of a mysterious disease. The obsessed Sheila returned, time and time again to terrorize Lauren over the years, even escaping from a prison for the criminally insane, in both Genoa City, as well as Los Angeles.
By the time Sheila arrived in Genoa City in 2005, having had plastic surgery to look exactly like Phyllis Newman, Lauren was married to attorney, Michael Baldwin, and they had a new baby together named Fenmore, whom they called "Fen". Sheila kidnapped baby Fen and Phyllis' baby, Summer, in her plot to get even with Lauren. But in the end, Lauren was the one who killed Sheila in self defense.
Many years later, Sheila's sister, Sarah Smythe, showed up with Sheila's until then unknown twenty year old twins, Daisy and Ryder Callahan to carry on her tradition. They kidnapped Lauren and held her hostage while Sarah (who had had plastic surgery to look exactly like Lauren) took Lauren's place with Michael. Lauren ended up killing Sarah in self-defense as well, but the twins escaped, promising revenge.
Six months later, Daisy returned pregnant from drugging and raping Daniel Romalotti, and had her baby, Lucy. Lauren became fearful for herself and for Fen after Daisy was only given time-served and put on parole with psychological counseling, claiming that her actions were controlled by Sarah. So Lauren made plans for Fen to stay with her son Scotty in Toronto for his protection. Daisy boldly entered Fenmore's intending to spend a gift certificate on clothes for Lucy and taunted Lauren. Lauren freaked out and pulled a gun on Daisy, and was arrested for assault with a deadly weapon. Michael came to her aid and Lauren got off with probation. Daniel ended up marrying Daisy to safeguard his daughter, Lucy.
At their celebration of Michael's new job as interim D.A., Lauren surprised him with the return of their son Fen, who had become a teenager.
Fen became friends with Summer Newman who was having a hard time accepting being the daughter of Phyllis. After an altercation with Phyllis, Summer disappeared with Fen, and they hid out in the skating rink and kissed. After they were convinced to return home, Fen was chastised by his parents and urged to not see Summer anymore.
Noah found out that Summer had been bullying Jamie the boy that Ronan had been mentoring using FacePlace name of "Brittni", and he cautioned Summer about her irresponsible actions. Summer went to Jamie and assured him that she was not "Brittni" or like the rest of the kids who picked on him. Fen accused her of faking it, but she claimed she actually liked Jamie. Summer came on to Fen again to try to get him not to rat her out to their parents, and Fen reacted by pulling away and telling her he didnít really like her very much. But Fen jealously took over taunting Jamie using a burner-phone due to Summer and his father Michael's sudden interest in the boy. Jamie's father was arrested for a hit and run DUI, and causing an injury. Once his father went to jail, Jamie would have no one to live with, and would be headed for foster care. Hearing about this, Fen became jealous, sure that his parents would take the kid in. Later, while talking with Summer, Jamie kissed her, and Fen found out about it.
Fen's burner-phone fell out of his backpack, but Fen claimed to Michael that he had it to cover his relationship with Summer. Jamie was put in a group home, and Michael discovered Jamie had been beaten up by his roommates, but was unable to persuade a judge to intercede. Fen saw Summer hugging Jamie again over his injuries and went off on them, telling Jamie that Summer was his FacePlace stalker Brittni, causing Jamie to pack his things and disappear. Michael confided in Paul how concerned he was that Fen was heading toward becoming another Ricky or young Michael or Kevin, being so full of rage. Paul tried to reason with Fen and convince him that Michael loved and wanted to help him.
Jamie returned, having nowhere else to go. Fen agreed to back off, and Jamie agreed he wouldn't tell Michael about Fen's texts. Fen put a valuable glass box into Jamie's backpack and stole $200 out of Lauren's purse, intent on getting Jamie in trouble. When asked if he took them, Jamie felt affronted and left. Fen followed Jamie, and they fought on the roof where Jamie had been hiding out. Jamie was later found by Paul where he had fallen to a roof below. While Jamie laid in the hospital unconscious, Michael accused Fenmore of setting Jamie up, but Lauren refused to believe it. Jamie regained consciousness and was released, but he refused to tell anyone what had happened.
Jamie told Summer that she and Fen were both responsible for everything that had happened to him. Summer apologized, explaining that by bullying him as Britni she had only been trying to get back at Ronan, but now realized it was pretty dumb. Michael confronted Fen, and Fen accused Michael of choosing Jamie over Fen, saying he would never forgive him. Then after a verbal fight between Fen and Jamie, Jamie decided to press charges against Fen. Fen was arrested for assault in his home. Lauren followed him to jail and got him out on bail after he spent the night in "juvie". Both Lauren and Fen were resentful of Michael for not supporting his son. Lauren began hanging out at the Athletic Club bar with Carmine coming onto her. He took her home one night when she had too much to drink, and another night he kissed her. Fen found out about Michael's past on the Internet and threw it in his face. Michael failed to convince Fen that it was because of his own past that he didn't want Fen going down the same road. After Paul found Jamie attempting to jump from the same roof, he convinced Jamie that he could help him make things better. Jamie admitted that he had lied and had been attempting suicide that night with Fen, and the changes were dropped against Fen. Much to Fen's relief, Ronan was granted guardianship of Jamie and he moved to Washington, D.C. to live with Ronan after apologizing to the Baldwins for all the trouble he had caused them. But Fen still refused to forgive Michael, and Lauren still resented Michael for not believing in their son as she had, and moved out.
Fen went to Kevin asking to live with them, but Kevin refused and told him to go home. Fen questioned how Christine and others could forgive Michael for the things he had done to them. Kevin told Fen that people change and prove themselves worthy of forgiveness. Christine confirmed her forgiveness, telling Fen that Michael had become one of finest men she knew. Feeling remorseful, Fen confessed to Michael everything he had done to Jamie, apologized, and said he wanted to make it up to Jamie who had nearly died because of him. Michael asked Christine to become D.A., and he stepped down.
After Lauren returned home, Michael decided their reconciliation was not working and that he would move out. Fen accused him of giving up. At On The Boulevard, Fen apologized to Summer for everything he did to her and to Jamie, then came on to her, but Summer told him she only wanted to be friends. Carmine overheard and told him to go after her; that a guy like Fen had a lot to offer.
Fen admitted to Kevin he hated to go home, afraid that he gets so angry, has no one. Fen told Lauren that he felt that he had broken up his parent's marriage, that he loved Summer, but she couldn't stand him, and all he does is screw up. Carmine convinced Fen to apologize to Summer and ask her to the prom, which Fen did.