Boyfriend thinks that I will treat him the way my mom treated my dad. Not fair.

My boyfriend, the man who wants to marry me, all of a sudden keeps mentioning that he's worried that if we get married and have kids and don't work out, I would do what my mom did and keep the kids from him and brainwash the kids to think poorly of him. I am VERY against how I was raised in that way and told him I would never do that. He said I can't help it because that is all I saw growing up. Oh and that I don't know how to treat a man since I didn't have a dad for part of my life. Btw, my dad and I are great now and I know I would never do those things. Do you think a woman will eventually mirror what she saw as a child? I don't like feeling guilty for something I didn't even do!