Emily throws a pool party and Tamra brings a surprise guest who wants to clear the details about Jenn and Ryan's past. Gina works through personal issues with her ex. Heather and Emily make peace. After Tamra and Emily exchange stories, Shannon and Tamra have dinner with the OG of the OC, Vicki Gunvalson, where Shannon discovers that Heather may be discussing her relationship issues with John Janssen.