The door behind her opens

But just as I was about to orgasm the door behind me was yanked open, an angry voice yelling, "What the hell is the racket....?"

We tumbled backwards, two arms catching me, my anonymous lover squishing me against my savior a long moment before resuming the fucking in earnest, like being caught was a turn-on. Hell, the orgasm that had been postponed by the fall came barreling back with a vengeance when I saw who it was behind me.