Well besides those two suggestions. If your out still in dressing room is a real turn on for me and you it seems. Open top of dress and pull up dress to show panties and open dressing room door totally by “accident of course” one pic ass toward open door one with front in doorway
Really hot one perhaps go to Victoria secrets pick something out go to dressing room set phone to record laying conspicuously so it can record and call for one if the girls to come help you undo dress or bra you can decide how to edit video to share
If the dressing room has a bench sit down and put one leg up on the bench spread legs and pull you dress up and open it to uncover your bra. Put one hand on your pussy over your panties like your rubbing your sweet pussy