That's what I mean, though. You can say as much as you want that you're not unsatisfied with her, but the fact is that you're not satisfied with just her, either. I don't think there's any way to explain that to your partner without making them wonder why they're not enough to make the one they love completely happy. It's an unfortunate side-effect of a partnership.

[And most people - human, mutant, immortal, whatever - can't just shrug that sort of thing off. It hurts, and that uncertainty sticks.]