Chandler and Monica prepare to leave for their honeymoon as Rachel prepares to tell Ross that he's the father of her baby. Joey and Phoebe scheme to get inside the newlyweds' apartment after discovering that they don't have a key. Ross thinks that Rachel wants a relationship with him, but is stunned when she gives him the news. Monica and Chandler become jealous of another honeymooning couple who get bumped to first class on the airplane. Rachel goes for her first sonogram, where Ross joins her.