Ahh, he didn't even physically sleep with her. Ahh, he couldn't even have met them while she was alive. See, he's completely and utterly innocent in any and all regard, so he can proudly be an adorkable father figure from here on without reservations.
Look, it's not that I'm desperately looking for drama, but it's just... weak. Wouldn't it be so much more interesting if this family had to struggle with real internal character flaws instead of this external magic bullshit...