No. She's not crazy. Probably just a hard alcoholic.
I had an alcoholic roommate in college. He'd get so wasted that he'd pass out with his clothes on and urinate on himself. Then in the middle of the night he'd wake up and remove his wet, soiled pants and underwear and pass back out. He often woke up naked from the waste down (and very embarrased).
Those were the bad nights. On the good nights he'd pee on his floor, in the corner, in the trash can, on his stereo, etc. He always thought he was in the bathroom too.