@Suck-a-duck She's a normal person with no abilities. If you're going to be ordinary, might as well be in the world with toilets and electronics. In her place, I'd also want to go back.
She's dangerous. If MC is as ruthless as to not care about mind control and rape, the smart thing would be to murder her before she turns bitter.
I mean, it would ruin the tone and become depressing, but it would be consistent with the kind of decisions he's been making.