Lisa learns about Lala's financial arrangement with her wealthy boyfriend; Jax celebrates his birthday with a hilarious game of trampoline dodgeball; Stassi, Katie, and Brittany try a new strategy to get over a hangover; Schwartz and Jax volunteer to build a house, but find manual labor isn't their strong suit; James sheds new light on his former romance with Lala; and Schwartz and Sandoval secretly meet up with Scheana's ex-husband.