Daddy
How? Did they get werewolf DNA and fuckscrew mess with it somehow so it would work? God, that's so creepy! You're from your what now? Omg that is SO awesome. Mercy would sooo be a better mom than Mom ever was. I mean, considering.
Okay, yeah, I can see where tha'd be problematic. But if anyone can do it and not totally break the poor guy down in the process, it's totally you.