Is this a normal ual fantasy for a woman to have?

There is no such thing as an abnormal fantasy... you are free to think and fantasise about anything you want, no matter how wierd it might seem. As someone else said, you can even act on this if you have someone who shares the fantasy, people have all sorts of fantasies and do all sorts of roleplay during , from dressing up as a french maid to being used as a human toilet (not my cup of tea, lol!!) So if you are lucky enough to have an openminded ual partner then you can act out your fantasy, otherwise you can think about it, make it as real as you want in your own mind, and enjoy the ride... so to speak!