OP here! I did follow store policy. People could not go to our restroom. That’s because the restroom is inside the stock, next to our safe. We could not keep an eye on them, so it is possible that they could steal from us. Althought we would never refuse a child or a pregnant woman. This lady took of her pants and underpants. When she left the fitting room, she acted like nothing happend. We did give her something to clean it up.