He was starting to get extremely bored. This Potter was far less creative than his grandfather had been, but still equally annoying. He tried to remember a time when he found James to be everything he wanted to be, and figured it had to be back at Hogwarts. That didn't matter, but this boy was doing a great job of emulating both James and Sirius, which was astonishing when one considered they'd been dead for the boy's lifetime.
He really would have left if he could, he had enough food now to get through the weekend if he rationed carefully and used the right charms, so there was no reason to stick around. Of course, if Potter Junior wanted to thrash him he could stay around for that. It would break up the monotony of his weekend. He didn't have money for healing Potions though, so he'd just as rather not.
Finally the Auror--who wasn't actually as nice as he'd first thought, but he wasn't disappointed. No one ever was--moved and he could get by. He knew he was chancing getting caught by a fist, but he was feeling trapped and needed to just go home.
"Don't worry about that. Now that this fat pig has all he needs, he'll be going." He started to walk away, and wondered if he was in for a thrashing after all.