Eileen stared at him for a moment, trying to figure out what the hell he was saying. After a moment she decided against trying. She was too tired to try and talk about time travel trees. Or it's branches. "Okay, fine. So you are here to swear allegiance to my son and make him live a better life?"
"Among other things," the man nodded.
"Why allegiance? My son isn't a lord or a king or anything like that. He's a halfblood for Merlin's sake."
"Well, I think allegiance sounds better than servitude or slavery," the wizard shrugged.
"Oh," Eileen murmured and blinked. Did life debts really force someone to do that? The only way to way back a life debt would be to return it - to save the life of the person who saved your life - as far as she knew anyway. If Severus really had saved this Harry as many times as the man seemed to think, then it would perhaps take a while to bay it back, but this sort of thing wasn't necessary. "You know, I don't think a life debt forces you do that. Even if there are several."
"Well, no," the man admitted. "But it gave me a perfect excuse to travel back in time to meddle with timelines as I see fit."
"Oh," she said again. Well, that made more sense. Or not.