Before

You grab your cellphone from your nightstand. Tapping the screen to dial, you anxiously wait for her to pick up. "Hi there birthday boy," you hear her chime. "Normally you only call me this late when you have something dirty on your mind." She teased, her voice sounded breathy and warm, her usual tone when she was indulging your more sexual requests.

"I just wanted to ask if I could borrow something from you." The sound of her voice knowing you were up to no good and feeling of the soft lacey fabric against your cock as you stroked yourself was almost too much for you, you reach down and slowly slip the thong around your ankles, gently pulling it up your legs.

"Borrow? You mean like my cute lacey thong that you stole the last time I let you get into my pants?" You could hear her moaning under her breath, she was definitely playing with herself just as hard as you were at this point. "Those were my favorite, youre probably just using them to jerk off anyway." She knew just how to push your buttons, lucky for you she is just as much of a pervert as you are.

"Well yeah something like that baby, but since it is my birthday and all, I think I would like to borrow something a little bit more intimate." You slowly finish pulling the thong up. The dainty lace straps resting just above your hips, and the thin strip of cloth barely hiding your throbbing erection. You left a bit of emphasis on the last word, knowing it would peak her interest.

You could feel it starting, your cock pullsed and throbbed as you shot off a huge load. Cumming all over your chest and stomach. You feel your crotch tingle and pulse, you let out a gasp. you feel something in your abdomen pinch and pull inward. Cum continues to spray from the tip of your cock. You stare down in excitement as you see your once proud cock shrinking down, now about half its original nine inches, your testicles are practically gone already, the skin now appearing more soft and hairless, your pubes appearing in a neat and well groomed patch. You can hear your girlfriend moaning on the other end, sounding both surprised and overwhelmed with orgasmic pleasure. You reach down and try to stroke the pathetic shrinking nub that was once your cock, the juices that were spraying just a second ago now barely leaking, you can feel it shrinking between your fingers, getting smaller and smaller, until its just barely smaller than the tip of your pinky.

You take a deep breath, regaining your composure, you hold the phone back up to your ear. "You okay with me borrowing this for a bit baby?" All you hear on the other end is the sound of your girlfriend trying to catch her breath, maybe the transfer took a little bit more from her than you thought.

You smile, looking down at your girlfrinds pussy, now neatly situated between your own legs. Already wet and aching with desire, you rub your fingers down between the lips, resting your hand on the mons. Idly rubbing your borrowed clit.

"Baby? You still there? Talk to me bunny"