Terrence could tell she was uncomfortable, but he had no intention of hurting her, not unless she provoked him into defending himself. He moved over a chair and sat down, so that he would be a relatively fixed point in the space of her flat. He was a relatively safe distance away from her and Quaffle, at least by his standards; she would certainly have some warning if he made any move to do... well, anything. Maybe that would make her feel more comfortable.
"Is everyone else you know... affected?" he asked, searching for language that wouldn't break his Vow. He was trying not to show too much emotion, but there was sympathy in his eyes. Not pity, just understanding, if that was the case. "The way you used to be."
He wasn't sure if that was her reason for not leaving - that or the fact that she was scared of Death Eaters, or a combination of the two - but he wouldn't blame her if it was. He wondered if it drove her as crazy as it did him, if she would start prodding at people to see if they came out from under the potion's influence. He hoped so, selfishly, because he wanted her to understand, and because he wanted as many people as possible out from under it.