Have you tried waking her up to take her outside? I know that'd probably be pretty inconvenient, b/c I'm guessing you're sleeping, too... But I'm not sure what else you could do. I would talk to a vet about it, too. When I taught kindergarten, I had a kid who I had to wake up in the middle of nap time to get her to the bathroom, or she'd have an accident. It seems like it'd work for a dog, except it'd just be a pain sometimes if you're sleeping.
You could try trimming her, but but the issue of peeing would still be there and I would guess it wouldn't completely solve the smell issue.