It's not technically magic--but that's beside the point. She wouldn't start with the whole thing all at once, no, that would be a terrible strategy. Although she could probably sneak in without anyone catching her--she can edit peoples' sensory perception to not include herself. Or in other ways. Either way, if she can do this she can certainly do it without reminding them of his existence. He might be the only one that ever was, or they might be vanishingly rare; less than one a generation. Either way it would harm nothing to check.