Whenever going at it with my girl for more than 20minutes she always has to stop and go for a pee before we carry on. She goes before sex but heard that it is a reaction to her orgasming but not letting go?
She has always been one who comes during oral but I am never sure she does when we are getting down to it.
You can ask her to relax and let her body do what ever it needs, she may pee on you or the sheets. She may be embarrassed to do it, so talk to her. Many women feel the urge to pee when having sex but they hold back and it becomes a mental issue. Some women can relax and squirt fluids and urine too. It is up to the couple to find what works for them.
I have had a couple of women squirt and for me and they, it was Awesome!!!