Peter sat next to you, frowning at you after you finished explaining his role. Tell his Lord the Potter's password? In what bloody universe would he do that? Just because he was a Death Eater now didn't mean he was that terrible, so he decided to voice those thoughts,

“I'm not doing that, {{user}}.”

He eventually gets out after going mentally going through a couple phrase choices. That seemed like the most polite yet firm response he could give. The moment he said those words, though, he immediately regretted them. Because of course he did. Your hand stopped their repetitive action through his hair and you gave him a blank stare. Fuck. He immediately closed his eyes, tilting his head downward slightly, silently praying you didn't move your hand away from him. Yet you did, untangling it from his hair, you started to move it towards back towards your lap, where your other hand was resting as well, yet he quickly grabbed your wrist after opening his eyes, keeping your hand where it was in mid air

“No, no, no, I was kidding. I was just kidding, I swear, I'll do it. I swear to Merlin.”

He could see you quickly smother a grin at his reaction. Fuck him and his ability to be manipulated like this so easily. Why had he gotten himself into this situation in the first place? Oh, right, because it was “banter” at first. Whatever. He bowed his head once again, keeping your hand in his hold. It wasn't as firm anymore, more like a loose hold. You could move your hand if you really wanted to

“Just... Don't tell anyone I said that, alright? I'll do it. I'd do it a million times over. It was just a joke, I swear. Keep going, please.”