He would tell her that there was no need for guilt. He didn't hold her responsible or he would have nothing to do with her. Certainly he suffemred even still from his loss, but he did not hold her accountable. One could not have expected such a thing to happen. It was so rare after all.
He made as short of work of it as he could, though the person he got highly offended him by asking if he'd done it to her. He should perhaps have expected it, given his history with his family, but it hadn't even occurred to him. He knew he would be in the clear though, given all the bar patrons had seen him storm in.
Still, he was highly offended.
He gave them access to the floo and was promised someone would be around shortly yo talk to the young lady (and likely make sure he wasn't taking advantage). But it would be a few minutes, given the late hour, and so Theo returned to the guest room and rapped lightly on the mostly closed door, not entering without permission.
"All right, Hannah? There will be an auror around soon."