She seems kinda like a weirdo. But honestly again you're being way too empathetic. She's being a retard and theirs no need for you to respect or quote her decision. I would've said something like "Do you suddenly hate sex or something" Don't be afraid to call chicks out when they're being weird. And you will likely be able to get to the root cause of the issue. With this chick, we still have no idea why she's saying this. Did she not enjoy sex with you? Did she get raped a few nights ago? Did she find Jesus? So many things it could be, and without finding out the reason you can't address it.