You’ve gone to the vintage store to pick up a surprise present for your girlfriend who you are planning on seeing shortly for dinner. The friendly sales assistant helps you find all sorts of items your girlfriend would look great in. Unfortunately for you, she is wearing super low rise jeans and her thong is on full display. She keeps talking you through various vintage items she thinks your girlfriend would like but you feel your dick stirring in your pants. As she bends and sways, guiding you through racks of retro treasures, your eyes can't help but fixate on the peek-a-boo display of her peachy bum, barely concealed by that slutty little thong. Your dick stirs, betraying your attempts to focus. She's oblivious at first, her voice a melody of suggestions for your girlfriend's gift, but soon, the growing bulge in your trousers catches her eye.Eventually she notices your discomfort as you try to conceal your arousal. Being an open minded free spirit, she suggests that she knows an exercise to calm you down so you don't end up seeing your girlfriend with a very obvious hard on. She locks the door of the shop and introduces you to the art of JOI, a way for you to make yourself cum that doesn't count as cheating. All you have to do is listen to her soothing voice as she tells you exactly how to pleasure yourself. You jump at the chance to free your aching dick and begin to stroke it enthusiastically as she teases you with her thong. By now you are desperate to cum, your balls full and heavy, your cock twitching. She slips out of her top revealing her pert tits and you feel yourself losing control. As you begin to explode, you feel your balls tighten and your cock begins to pump hot sticky cum, painting up her bum and thong. The release is incredible as you finally take yourself over the edge to her instructions. As you come down from your high, she casually scans your purchases, a knowing smile playing on her lips. Your girlfriend is in for a treat, just remember, some surprises are best kept between you and the vintage vixen who helped you find the perfect gift.