He can sort of guess that that's food or eating-related, and that's something he can easily do with one hand, and he can ask her next time even if he doesn't know the sign for 'hungry?', so he mentally stores that sign away for later.

Initially he might seem a little miffed that she's just swooping in and touching his stuff, but he can see that she's trying to help, and he's doing his best not to be petulant or sulk or stubborn about it, schooling his face back into a neutral expression. She gets a grunt for her efforts, which she'll learn soon enough is his sign for 'thanks'.

"I need to clean up the rest of the place. Do you want to go out or anything?" Yes, he's kicking her out. No, he has not much subtlety.