<P> Austin Stowell portrays Jesse . He became Lauren's boyfriend in season 2 . After sleeping at Jack's guest room with Madison and Lauren, Lauren is banned from seeing Jesse . At his graduation party, where he drinks too much, Lauren discovers him sleeping with Madison . </P> <P> Kathy is portrayed by Cierra Ramirez, introduced in the 100th episode as a new freshman who Amy mentors as part of a senior project . She got pregnant by her much older ex-boyfriend, and plans on giving her baby girl up for adoption . She is initially wary about talking to Amy because unlike her, she chose to raise a child as a teenager . Kathy eventually opens up to her about her worries on not having friends because of her condition . She currently lives with her grandmother because her parents kicked her out . Kathy explains early on that even though her baby will have an open adoption, she has no plans to be involved in the child's life . She meets Ethan and they start connecting about their histories and even go on a double - date with Amy and Ricky . Their relationship hits a speed bump in the road after Ethan makes a disastrous first impression to the prospective parents, who later tell Kathy to break - up with him . They quickly get back together in the fall season finale . In the holiday special, Kathy goes into labor on Christmas Eve and gives birth to a baby girl on Christmas Day . The adoptive parents name her Hedy . She is portrayed by Cierra Ramirez . </P> <P> Michael Grant Ethan is Ricky's 14 - year - old foster brother who ran away from their house a few years after stealing a knife from Margaret and Shaker . He first appears when he gets into trouble for sending naked pictures of his ex-girlfriend to everyone in his contacts, which ultimately lands him in juvenile detention . Margaret decides to take him in again, and forces him to go back to school . In season 4 he is forced to go to summer school and immediately gets into trouble for stealing condoms from the nurse's office . Despite his actions, Ricky still tries to install sense in him remembering his early days before he met Amy . He begins dating Kathy, who is pregnant with her ex-boyfriend's child . They decide to take their relationship slow, but Ethan has trouble respecting Kathy's boundaries . Such as when he meets the perspective parent's of Kathy's unborn daughter, and asks rude and personal questions about them . Kathy breaks up with him when her perspective parent's think he is too unstable to be around . Ethan later confides to Kathy that his biological father injured him when he was a kid, causing his distrust in adults . After meeting Kathy, Ethan tries several times to get advice from Ben on how to be a good boyfriend to someone who is having a child with another guy, but Ben show's no interest in helping him . In the episode "Holly Rollers", he is shown to be a talented piano player . Then him and Amy start getting closer and closer while Amy and Ricky get farther . He is portrayed by Michael Grant . </P> <P> The following is a list of characters that appear on the show, but usually do not add to the overall plot or story line of the series . </P>

Secret life of the american teenager ricky's brother