At a Camden party, Roxanne and Betsy get into an argument about the war in Iraq. When Martin's father shows up, Roxanne is attracted to him. The twins want to spend more time with Ruthie.

Eric hides Mary's divorce from Annie, and Simon's romance heats up. While the Smiths brace for a custody battle over the Davis kids, Simon arrives home for an overnight visit with his girlfriend Rose (Sarah Thompson), whom Annie finds "condescending and rude." Annie's intuition tells her Rose is pushing Simon for marriage, and that something's up with Mary and Carlos. Although Eric knows Mary has filed for divorce, he avoids sharing that information with Annie just yet. Since Vincent doesn't have the guts to break up with Ruthie, Martin takes it upon himself to reveal the truth. Lucy is surprised by Annie's erroneous assumption that Carlos and Mary are still together. Meanwhile, Simon hears from Kevin that Rose had led Annie to believe they're engaged. When Simon confronts Rose, he reiterates that, even if they discussed the possibility of marriage, he didn't actually propose. Visibly upset, Rose walks off. The Davis kids are stunned to learn their mom is refusing to relinquish custody. As much as they want to be adopted by the Smiths, the children fear that if they testify against their mother in family court, she'll wind up turning to drugs and alcohol. That's not a risk they're willing to take. Later, Ruthie asks Vincent to never call her again, and Rose asks Simon what he wants from their relationship. To Kevin's delight, Lucy puts an offer on a fixer-upper house next door! The Smiths and Davises reach a compromise: George and his wife won't push for adoption, but Mrs. Davis will allow them to become the kids' foster parents. Minutes after Eric shocks Annie with the news of Mary's divorce, Simon and Rose announce they intend to get engaged "in the near future." That evening, the Camdens join Martin as he welcomes his father home from Iraq. .. _

Ruthie tackles a new project and Martin confronts his father. Sandy's estranged dad Ed stops by church with $3,000 he wants Lucy to give to his daughter. Angry with Simon for buying Rose's diamond ring, Eric refuses to loan him $100 to pay his phone bill. Ruthie announces she's collecting Campbell's soup labels to raise funds to buy a computer for the school newspaper. Knowing Martin dreams of joining a minor league baseball team after graduation, Meredith promises to wait for him until they're both ready to settle down. To aid Ruthie's cause, all the Camdens start eating lots of soup. Simon tries hitting up Matt and Kevin for money, but they decline. Ruthie tells Annie she hopes to date Jack, an 18-year-old "hottie" from school. During a conversation about Ed's unexpected gift, Sandy surprises Lucy by saying she once slept with Simon. Fortunately, Sandy assures Lucy that the baby she's carrying is Martin's child. While Martin tries to summon up the courage to discuss Sandy's pregnancy with his father Bill, Ruthie is thrilled when Jack confesses he'd like to date her, once her parents allow it. Later, Martin asks Eric to help him break the bad news to Bill. Although Bill claims everything will be okay, Martin disagrees, stating, "My life is over!" before walking out. Both Bill and Eric wonder how Meredith and Ruthie will react when they find out about Sandy. The next day, Ed, an admitted alcoholic, returns to church. He's just lost his job and wants his money back. Lucy lies, saying she's already wired the funds to Sandy. Eric vows they'll support Ed...if he goes into rehab. Over at school, Kevin urges Martin to come clean about Sandy with Meredith and Ruthie. When Simon reveals his sister Mary lent him $100 to pay his phone bill, Eric hangs up on him. .. _

The mixed joys of fatherhood way heavy. While Annie tends to the flu patients, Eric feels no better after learning that the haughty Colonel sired him before marriage. Martin's dad needs all his paternal love and self-control to patiently push the boy to step up to his upcoming paternity. Sandy's parents tell the Reverends to butt out, then refuse any responsibility for Sandy and disown her. Martin discovers an excellent reason that Ruthie shouldn't date Jack.

Martin refuses to drop baseball training to go to Sandy who is giving birth, although Eric begs him; Martin also gets a full-scholarship offer from nearby Sequoia College. Kevin patiently convinces Lucy that his 'husband at home' dreams squares ideally with a second-child wish. Martin finally visits his newborn son in the hospital, where both grandfathers commit to help each other and their offspring.