Marcus has a difficult time sharing Billie with the program and feels excluded from her life. Billie invites Marcus to an AA meeting, but he decides to write an article about it. Billie has difficulties taking on her new responsibilities as the AA group secretary.
Clark and Henry ask Billie to carry their baby, but Marcus doesn't think it's such a good idea. Dave suffers from of chronic tiredness since he began dating a female athlete who beats him soundly at every sport they try.
Dave and Marcus attend a party at the "Perfect 10" mansion without telling Billie and Raquel. Invitationless Billie and Raquel hatch a plan to get even with Dave and Marcus. Nobby Clegg makes amends with a playmate.
Trudy enters the hospital for plastic surgery, but the doctor refuses to do the operation because her drink problem has lead to a life-threatening heart condition. Martin tells Billie he is leaving Trudy.
Marcus' demanding father visits, not knowing that his son is getting divorced and that he and Billie are dating. Pregnant Haley asks Dave to act as her husband at a college reunion because she doesn't want anyone to know she's a surrogate mother for a gay couple.
Dave tries to tell Billy that Marcus is involved with Nancy again. Dave first gives the wrong impression when he attempts to warn Billie, but things come to a head when Marcus shows up at his own surprise party with Nancy.
Billie goes on a date with movie star Jake Newman, but he dies during the date and Billie is asked to speak at his funeral service. Dave accidentally proposes to Raquel when she tells him her visa has expired.
Dave is caught up in a jewelry store robbery with Billie on the day of his bachelor party while shopping for a wedding ring for Raquel. Trudy wakes up in the arms of a handsome man who turns out to be an expensive gigolo.
Billie tries to stop Dave's wedding. She takes extreme measures to prevent Dave from marrying Raquel, including seeking out a medicine woman to place a curse on the ceremony. Marcus reconciles with Nancy.