Private Practice - Season 4, Episode 20: Soundtracks

Charlotte shows Cooper her family's dress. They argue.

Addison and Sam argue about her telling Naomi about them splitting up

Cooper & Charlotte's dinner starts; Amelia & Addison discuss the unhappy mood of the party; Pete accuses Addison of abandoning Violet; Naomi kisses Fife; Sheldon chats with Charlotte's mother; Amelia tells Cooper's parents that they should give Charlotte a chance; Cooper & Charlotte parents tell them they shouldn't get married.

Charlotte and Cooper are making out on the plane and then getting married in Vegas (continuing through to the end)