The thing is, she won't. He knows she won't. Even if there would be a day that she'd decide she couldn't be with him anymore, he'd kill her long before that day came. One day he'd hit her too hard, or she'd fall and hit her head, or any other myriad of things, and she'd be dead and gone.

"Yeah, of course." He says it emphatically, because as doubtful as he is it'll ever happen, god does he want it to.