Lyla began as a porn star working for Luann Delany at Cara Cara. She made her name as one of the 'Sorority Sisters', doing scenes with Ima and other girls. After threats and a beating by Georgie Caruso's men, she is protected by Opie, at her request. She uses cocaine and drinks alcohol, but doesn't let it affect her parenting of Piper.
She and Opie began to grow close after they first met. Like Opie, Lyla is a single parent and she helps him with his children. Her son is named Piper. Opie's involvement with Lyla was not entirely welcome by some, particularly Gemma and Tara who initially were unable to look past Lyla's profession. After Opie learned the truth about Donna Winston's death, he made peace with his clubmates then went to Lyla's house and slept with her. She was last seen sheltered in the SAMCRO clubhouse with other relatives of the club members seemingly suggesting that she is now Opie's 'old lady.' She's seen in the season finale with Opie and the rest of the club at the police station waiting for word about Ethan Zobelle and AJ Weston.
Lyla is seen at a party in season 3, where she is about have a sexual encounter with a paid Asian customer; yet Opie seeing this starts a fight, and forces her to leave. Later, Lyla is seen defending Tara, when she punches her friend Ima for sleeping with Jax. Lyla also discovers she is pregnant, and Tara takes her to the clinic to have an abortion. Opie does not know about this because he is busy in Ireland. During the final episode of Season 3 Opie and Lyla announced their engagement to the rest of the club. She is seen at the end of the season finale, helping out Gemma while she's under house arrest.
Lyla and Opie were married in the 4th Season Premiere, their wedding was also used as a cover to retaliate against the Russians for going after Jax in prison. Lyla and Opie however, separate toward the end of the season when Opie finds morning after and birth control pills that Lyla had been hiding from him. He sleeps with Ima, Lyla finds out and admits to having had an abortion during season 3. The couple later agree that their marriage is over, although the Sons put measures in place after this point to protect Lyla during the supposed cartel attacks. Jax also asks whether Lyla will pick Opie up from the hospital after Jax shot him, and Opie says she will, although whether she does or not is never shown on screen.