Back at Morgan and Chuck's, Morgan's grilling Chuck on Sarah, then on Carina: Will she be there? If so, he'll run a comb through his beard and come with. Chuck is looking for his keys. Morgan wants Chuck to get Carina an invitation to the housewarming party. Chuck says he will if Morgan will find Chuck's keys. Morgan pulls them out of his pocket, and Chuck says, "Should have known."
At the party, Chuck and Sarah make awkward conversation about love and relationships with Karl and Carina. They're the most obvious liars ever, which I guess is sort of telling since they've always been too good at faking the relationship before. Casey comes in with a wig and moustache, and Carina introduces her "Uncle Johnny, her daddy's brother." Casey: "Kid brother." Karl's glad to meet someone from her family, but isn't sure about the resemblance. Carina: "Daddy and Uncle Johnny share the same thick neck and square head." Chuck's eating baby lamb chop hors d'oeuvres, but Sarah's all focused on where they'll escape to find the vault and when. Chuck tries to talk about this thing hanging over them since Prague. He says he misses her. Sarah watches Karl and Carina excuse themselves from Casey. Chuck goes on that it feels good hanging out as friends like they used to. Sarah says it's just a cover and leaves. Carina watches and heads over to Chuck, asking what the hell he's doing to her mission, since they're supposed to be a happy couple. Chuck says Sarah's been so cold ever since he got back from Prague. Carina calls him an idiot, and says she's been cold because she loves him. She tells him to get his head out of his ass and go be a spy. But he's a little busy being dumbfounded right now.
Chuck chases after Sarah and says Carina said something to him; he knows it's not the best time, but they need to talk. Sarah tells him to focus on the mission, and that Carina's getting the key. In another room somewhere, Carina's giving Karl a pep talk before his toast. They hug and she steals the key from his pocket. Sarah sneaks by and takes it from her. He goes back out and toasts. He says he wants to spend the rest of his life with her. She's real, honest, and good. A toast to the future Mrs. Stromberg. He loves her and kisses her. Sarah and Chuck sneak away. The toast listeners start to break up. Carina asks him if that's it, and he's like, "Uh, no. Also ... may our first child be a masculine child." Weird. Everyone toasts. Chuck and Sarah aren't even to the vault yet, and he's trying to talk to her. She radios to Carina that they just got to the vault and need more time, so Carina calls the crowd back and says her Uncle Johnny's dying to say something.