What? The guy fell asleep, but you’re not allowed to because you’re supposed to suck his cock all night?
That’s an, interesting, fantasy but one of those ‘dumb in real life’ things.
If he really got ‘mad’ about it then, personally I’d be out looking for someone who appreciated that as good as I was at sucking cock, I need sleep too.
Your punishment is to eat marshmallows and then sleep. Probably reminiscent of what sucking his cock is like.