I know outside movie canon, Peter Maximoff, also known as QuickSilver, is the son of Magneto in comics. However, what about him in this "X-Men: Days of Future Past" and X-Men movies, is he the son of Magneto/Erik? While saving Eric, he didn't know that they seem to don't know each other. Although, he does says his mother once knew a guy who could control metal.
Pietro Maximoff: They told me you control metal.
Erik Lehnsherr: "They"?
Pietro Maximoff: You know, my mom once knew a guy who could do that.
Is it only a joke in the movie or are the filmmakers implying that he is the son of Eric?