PREVIEW: Sami defends herself to Roman; Kate and Hope call a truce; Tony discovers surveillance gear in the mansion; Mimi and Rex share a kiss at the carnival. SUMMARY: Roman runs into Sami/Brandon at the carnival and voices his disapproval of their new living arrangement. Sami defends the decision and takes a shot at Roman's sleazy affair with Kate. Meanwhile, Kate sees Lucas and he also bags on her about her relationship with Roman. Tensions rise as Brandon and Sami cross with Abe and Lexie and Brandon challenges Abe to a test of strength. Sami excuses herself when she spots Eugenia talking to Lucas; she's horrified to learn that Eugenia knows Sami switched the paternity test results and begs her not to spill the beans. Eugenia enjoys making her sweat as she goes off to play with Lucas. Meanwhile, Lexie thinks it's a mistake that Brandon moved in with Sami. As she waxes on about Abe being the father of her baby, Sami nervously moves up and assures Brandon that she's fine and ever