Speaking for myself, much of the time, I really do feel the need to pee following an orgasm. Nothing about ick factor. Especially following certain positions where there may be pressure on my bladder. I am also **warning: TMI ahead** one that releases alot of fluid following an O & it will wet the sheets & leave me feeling funny as it runs between my legs & down the crack, lol... So, she may be embarrassed. Perhaps offering to get up & get a warm cloth that you have ready ahead of time would help. Or tell her your thoughts in a loving way that would suggest that you love to be near her so much after S that you would love it if she put off clean up a few minutes, you just want to snuggle. Maybe she doesn't find the moisture sexy, or the feeling of having to pee is strong for her after O and she is too embarrassed to mention it. Let her know that it doesn't turn you off (the wetness if that is the issue). She doesn't know what you want unless you ask for it & it makes no sense to try to read her mind when there is aboslutely NO way for you to know why she is doing it unless she tells you the reason/s. She is the one you should be asking, in a non-critical way.

FWIW, It is also recommended that women pee within a few minutes of having sex to eliminate the chance of getting an infection.