Alex becomes involved with Donna, a young, unwed expectant mother from Elyse's natural-childbirth class but his interest in her becomes an obsession when he starts planning for her child's future and acting as if they were a real family.

Donna is flattered by Alex's concern for her and her unborn baby, but soon begins to realize that he is becoming a little bit too helpful.

With the rest of the family away for the weekend, Mallory is excited about having the house to herself until she is accidentally locked in the basement with the person she'd least like to be with her adoring neighbor, Skippy.

The mismatched pair do, however, come up with a unique way to keep warm and share some tender moments while waiting for their rescue.