Nothing

You don't feel any different after drinking the stuff and, after a few minutes of searching, you and Karen give up on finding rubbers and agree not to go all the way. Secretly you hope to get her drunk enough to fuck her bareback.

You take things back a step and you put your belt and shirt back on. Karen retrieves her bra from where you had thrown it early and puts it in her purse but remains braless. You both sit up, side by side, with your feet and legs on the bed and your backs against the headboard. There is a stereo with a remote and soon you have soft rock ballads quietly serenading Karen and getting her into a proper mood.

As the music takes its effect, you are soon heavily making out and groping the other under their clothes. You and Karen resume your drinking and soon you are both loaded up and naked. You are lying on your back and Karen straddles you. She is about to guide your erect cock to her pussy when there is a disruption.