text: In addition to this, he is having trouble using a potty, and the unorthodox advice he gets from his playmate, Eddie (voiced by Damon Wayans), doesn't make his problem any better.
  Plot
  Several months after getting married, Mollie and James welcome their second child, Mikey's half-sister Julie into the family. While at first, Mikey is excited to be a big brother, he begins to resent his sister shortly after she is born when the reality does not match what he dreamed being a big brother would be like. In turn, Julie is not impressed by Mikey, who also struggles with potty training, having several accidents despite encouragement from his friends and family. James, who was provided a job as a full time pilot thanks to Mollie's parents, and Mollie begin to struggle with their lack of time together straining their relationship. Mollie's younger brother Stuart comes to live with them temporarily, and James is hesitant, especially when Stuart pulls an (unloaded) gun on him thinking he's an intruder. The arguing between Mollie and James grows in intensity until James walks out, believing Julie is responsible for the situation, Mikey takes his vengeance out on Julie's stuffed bird Herbie. Meanwhile, after her apartment is robbed, Mollie's friend Rona comes to stay with them, and she begins to date Stuart.