Your girlfriend suggests that the two of you go to a key party. You aren't crazy about the idea, the randomness of it freaks you out, and it makes you wonder if you aren't enough for her. At the party you just keep to yourself, the attendees appear to be mostly middle-aged couples used to the lifestyle. Your girlfriend goes off with the older man who pulled her key tells you to enjoy yourself. While you hold up the key you picked, you're quite relieved when no one claims it as theirs. After most everyone has paired off for the night, the hostess notices you alone. She wants to help you find your match and she thinks she knows who it is- a new couple to swinging and the wife might be a bit nervous. While you wait it one of the bedrooms, you're a little comforted by the idea that your match has never done this before and might be as nervous as you are.
The second she opens the door and walks in, you are thrilled that she's a gorgeous woman... but the next second, you realize with horror that she's your stepmom! She takes a second to fully register that you are her stepson, and when she does she turns to leave the room... but she stops. She thinks, in her nerve-wracked state, her mind might be playing tricks on her- that she might be imagining a familiar face instead of a stranger. The two of you get to talking, turns out neither of you are keen on this whole idea, and while it seems strange, you'd much rather just sit here and talk with your stepmom until this whole event blows over... until you start hearing the moans of another couple getting it on in the next room. Well, this is awkward! Discomfort turns into annoyance when your stepmom thinks she recognizes the man's voice as your stepdad. And now that you're taking a closer listen, the woman's voice sounds like your girlfriend! What a night this is turning out to be! Your stepmom suggests the two of you make fake sex sounds to try to do outdo them. It feels silly but it lightens the mood... temporarily.