Hmm. Just because _you_ can't do it that way doesn't mean it can't be done. And if you look at the sequence around 2.12, where she pulls back her gusset, you'll see plenty of juice there, but no piss.
I agree. She pissed in her panties. I'm a woman and have been making my pussy cum all of my life. I can get turned on with no touch or stimulation but never been able to orgasm that way.