­The gang is disturbed as they each realize their partners remind them of a parent. While their partners flash in and out of being their parent, Barney and Nora go on a special date and plan on having sex for the first time. It turns out to be a catastrophic evening filled with injuries and unpleasant circumstances, but in the end they do what they set out to. Meanwhile Lily is feeling very unattractive as she is getting larger with her pregnancy, and Marshall does everything he can to make her feel sexy, all the while each seeing their father's in each other spoiling the mood. In addition Kevin is jealous of Ted, feeling he and Robin are so close they must still have feelings for each other, however it becomes clear to Kevin that this is not the case, and he befriends Ted seeing how fragile he is being the only one not in a relationship.