Marie's a smart cookie in one regard. Magneto could snap Logan in half. However i sure hope she let's Logan know she cares about him before he goes off to face Magneto. If not she'd regret it for the rest of her life, if something did happen to Logan. Plus I'm curious to when Marie is going to get around to telling Logan about his past. I'm sure Logan would be eager to learn whatever he could since he's been searching for years to find even the small clue.