She would be the ideal woman to no one. She's the worst of them all.
She can play with you and can make you worship her. Or else.
Think about it. She would want something done and if you don't do it, in the future she will fuck with you. You would think she forgot because you did, but then during sex just as you're getting into it she can shapeshift into Vladimir Putin for example and start holding you and moaning in his voice just to traumatize you and laughing the whole time while you're disgusted by what's clinging into you during sex.
Mystique can look like anyone she wants. Male or female, fat or skinny, young or old, alive or even dead as she can make herself look like a rotted corpse if she wanted to. Imagine her changing into George Floyd during sex just to piss you off. She's a mutant so you can't do anything as she can kill you quickly if she wanted to so you would have to take the punishment.
Call me volcel, but she's the least interesting foid in X-Men. We know how females are and giving them that much powers to shapeshift is only for their benefit and for your displeasure.