Chris tries to convince Reagan to have another baby; Ava's decision to join a mentorship program has bad results; Missy feels like she's cheating on Ava by helping Luke.
Chris agrees to throw a joint birthday party for Amy with an enthusiastic neighbor; Ava decides to take the party to the next level; Nancy looks for a man.
Reagan and Chris travel with Amy for the first time; old tensions resurface when Ava agrees to officiate her former bandmate's (Alanis Morissette) wedding.