Maggie, Cate's sister, is having marital problems and Paul invites her to stay over. This upsets Cate since they had a sibling rivalry for a very long time. Also, Paul and Cate are impressed about Bridget's maturity and let her go out with Donny Doyle who is home from the Naval Academy. Kerry and Bridget also wonder if Kyle has some other motives after he befriends Rory.