"I can." He said easily enough, watching the pained movements, the cur of his expressions-- all of it was delicious. There was something so favorable about seeing him like this, perhaps it was Charles' own arrogance being appeased.
He could help him with the pain, too, if he saw fit. However, if Erik didn't know, he wasn't so inclined to mention it. Not yet anyway; for now he'd let the man suffer with his choices-- as if punishment for his refusal to bring Charles with. He roots around, because he knows there's a first aid-kit somewhere under the bed. Dragging it out he settles it down onto the end, humming to himself as he started to prepare things. "I'll say I hope you've learned your lesson, and that's that."