Marina Oswald before the Warren Commission:

Senator RUSSELL: What reason did he give for striking you usually?
Mrs. OSWALD: Sometimes he would tell me to shut up, and I don’t take that from him. I’m not a very quiet woman myself.
Senator RUSSELL: “I’m not–” what?
Mrs. OSWALD. I’m not a quiet woman myself and sometimes it gets on your nerves and you’ll just tell him he’s an idiot and he will become more angry with you. Enraged. When I would call him an idiot, he would say, “Well, I’ll show you what kind of an idiot I am,” so he would beat me up.