You said you were shopping for lingerie for your girlfriend, but the shop girl knows better. She can tell that you are secretly a sissy and makes you try on all the lingerie yourself. Once you are dressed up all pretty, she shows you the hidden strap-on she wears just for such occasions. You'll need to learn how to wear plus and suck and fuck big dicks and she is happy to teach you how. By the time you leave this shop you'll be ready to be a total bimbo sissy slut.