Old Friends, New Era

S20, E1: Vicki returns only to find herself in the middle of Shannon and Tamra, who are at odds after an explosive encounter; recently engaged and in pre-marital bliss, Gina ponders questions about her new relationship status; Emily's home life is in a rebuilding phase; Heather gets a shakeup when her mother moves to California from New York; Jennifer brings new friend Carmella to Heather's Hearts and Heels party, where Jennifer reveals information that threatens Heather's friendship with Tamra.