Who: Sirius and Peter, with a cameo from a naked Beth What: Invading Peter's personal bubble because of all his self-loathing Warnings: Probably not. Maybe?
Sex was still something of a novelty to Peter, despite his regular indulgence in it. Mostly it was surprise that anyone could be sexually attracted to him, much less someone like Beth (and, to a lesser extent, Sirius). Beth was easily satisfied, which was good for Peter, because he had enough issues without having to deal with being a bad lover.
She was curled up and asleep right now, the little spoon to Peter's big spoon, despite being slightly taller than he was. She muttered in her sleep a bit sometimes, usually contentedly. Peter kissed her shoulder and sighed, allowing afterglow and affection to give him comfort.
It was probably because of this that he got up when there was a knock on the door. He searched in the dark for his pajamas, his senses still dull from the haze of sex. He left Elizabeth to her dreams, hoping they were good ones.
The knocking continued insistently, which should have tipped Peter off. It didn't. What did tip him off was the smiling face on the other side of the door, coupled with the realization that he was both unarmed and unprepared to defend himself from a potentially angry Sirius. Right now, his only hope was luck, which meant that he was about to die.