Instead of taking his shirt off right there, he'll roll out after Erik, a bit behind him. At the question Charles stops, and he'll set on looking very focused on yanking off his vest, then unbuttoning his dress shirt.

"Ah, yes... your room is as it was..." He'll mutter, as if he's not admitting he left Erik's room exactly how it had been. For a little over a month. As if he expected Erik to come back. Hoped he would. Even though through all the want and desire for his friend to return to him... he knew it wouldn't be that way.