None of Loki's glaring or grumping is bothering Peter at all. In fact, he, quite possibly, finds it amusing. And he is definitely intrigued by just how painfully hard Loki's cock is.

Also by how much Loki seems to like being ordered around. Not that under normal circumstances Peter would be at all good at being more of a dominant, but maybe he can help Loki find someone who is.

Whatever is currently affecting Peter has him very pleased at the near immediate obedience of the command he gave. That is ridiculously hot. Power or something like it is a heady drug.

Peter motions to the cushions on the floor. "Of course. I'm not unreasonable." Not entirely. "And since I can't be sure you'll be able to manage afterward, I want you to handle me first. Are you any good at sucking cock?"

Assuming so, Peter will draw his out and let Loki get to work. It's unlikely to take very long for Peter to get off, but he doesn't care about that. This is so he's more comfortable for when he teases Loki in a few minutes.