First-time mother Amy hesitates to return to her job and ""abandon"" her son to her work-at-home husband.

Questions about Carol and Nathan's courtship surface after Nathan's admission that he once had a crush on Amy in college.

Amy and Greg spend their anniversary on a plane trip home, but the presence of Baby Mel gives fellow passengers little to celebrate

An argument divides Carol and Amy over whose child could -- or should -- fill the sole vacancy at a school for gifted children; and the tiff soon spreads to Nathan and Greg.

Amy approves of her brother's fiancée -- until she learns that the woman may have had an affair after they got engaged.