Katie and Dahlia struggle for the gun and Simon musters enough strength to save Katie. Margo takes Dahlia to the station and Simon, who wasnt shot, and Katie look forward to a future without Dahlia. They make love. At the police station, Dahlia warns Margo about Simons dark side. Rosanna realizes that Craig was using her to get into Roses engagement party. Carly approaches them, determined to take the high road. Rosanna offers her sister money to start a design firm, but Carly rejects the offer. Meanwhile, Barbara arrives at the party while Lucinda is making a toast. Paul and Rose want her to leave, but Hal steps in to diffuse the situation. He makes a deal that Barbara and Marshall can stay for one drink. Barbara overhears Rosanna and Carlys argument and warns Rosanna not to let Carly get under her skin. While Rosanna is occupied, Craig flirts with Carly. Alison tries to get Aarons attention, but he rejects her offer to dance. She looks on as Aaron asks Lucy to dance. Later, she eavesdrops on Holden tell Lily that he lied to Craig about Aarons police record. Joe confides in Nancy that he wants to dissuade Rose from searching for the diamond. Someone threatens Joe into leaving and Nancy reports to Rose that Joe is missing. Rose runs to Henry, who offers to trade Joe for the provenance for the diamond. In Scotland, Isaac reveals that Ian is not a Duke, but Bonnie is in fact a Duchess. Paddington provides the evidence to prove Isaacs story. Ian insists that it no longer matters because they are already married, but Bonnie reveals that their vows were phony and she orders Ian and Garrick out. Bonnie apologizes to Isaac, who has come to say goodbye to her.