She awkwardly hovered in the doorway between the kitchen and the living room, unsure. Was she meant to go pack an overnight bag? He’d told her not to and part of her was still lying to herself that she wouldn’t stay anyhow. And if she happened to fall asleep, by accident, of course, she could just "borrow’ his clothes. He’d already admitted to liking it, so it obviously wouldn’t be any trouble. With how intently he was watching her, and how observant he was in general, he immediately notices the minute change in her body language.