In 2000, Alexis teams up with mob boss Sonny Corinthos to defend troubled teen Zander Smith, which leads to Alexis reluctantly becoming the full-time lawyer for Sonny and his enforcer Jason Morgan. Meanwhile, in 2001, Jax helps Alexis find her presumed dead sister Kristina Carter. By 2002, Alexis and Sonny have continued to bond, which leads to a one-night stand witnessed by Carly Corinthos, Sonny's estranged wife at the time. Alexis learns she is pregnant, but does not tell Sonny due to his dangerous lifestyle. Ned, who is dating her sister Kristina, agrees to claim to be the father. Kristina dies in a warehouse explosion meant for Sonny and set up by Luis Alcazar. At Kristina's memorial service, Alexis berates Sonny, blaming him for her death. Alexis gives birth to a girl she names Kristina after her sister.