As far as a CCW problem, she is not doing the CCW. As far as drawing and using it, ya got me but I would think that if there was no legal reason for her to not have a weapon you might skin by but I would check with the state or a legal beagle.
Having said that, if she is behind you and she tries to draw it (assuming you are right handed ) she will have to draw it with her left hand and even then it will be backwards to the holster as wallet holsters are designed to be drawn palm in. Could be very awkward. I would think it would be faster and less awkward to draw it yourself. I use the wallet myself for my 380 BUG.