Snooki hears the gossip about Deena's sister, and Vinny befriends two lesbians at the club.
The Situation isn't happy when he discovers that he's the victim of Pauly D and Vinny's latest prank.
Vinny tries to convince his lesbian friends to engage in a threesome, and Deena confronts The Situation.
Deena fears for her life when a storm hits Seaside, and The Situation's brother and Deena's sister join the roommates at the club.
The guys and the girls face off in an epic water balloon battle during the roommates' last night in the house.