Susan has invited everyone over for dinner, which as we know is just asking for trouble. Steve is particularly worried because Susan has recently redecorated the bathroom, and removed the lock, thus robbing him of his Fortress of Solitude. Sally's worry is that Patrick is bringing his new girlfriend: she's frightened that she will overcompensate her feelings of hostility towards her new rival by being embarrassingly nice. Patrick dimly perceives there might be a problem, so has told Jennifer that Sally is a lesbian...