As soon as the words had left his mouth, he regretted them. In the silence that followed he went through the potential responses and none were good. She might use her acerbic wit to make him feel very stupid, more likely though that she would be angry and choose to punish him in some way or worst of all she would tell him unequivocally that the relationship was really over this time. The seconds became minutes and her face remained expressionless. Finally, she spoke. slowly and deliberately.
"Go home. In two days, a parcel will be delivered. Follow the instructions you are given to the letter. If you fail never return, never call, do not contact me in any way - our time together will be at end."
Without speaking but with his heart racing he picked up his things and left.
His heart began to race once more as he accepted the parcel from the courier and headed straight to his bedroom. Inside he found a case containing 5 steel rods of varying thickness, an unfamiliar type of lube, a box of surgical gloves, surgical wipes and a sealed envelope. He tore the envelope open and saw her beautifully measured hand writing.
Take the smallest rod and clean it carefully. Put on a pair of the gloves and lube the rod. Insert it into your urethra until the entire rod is inside. Now masturbate. Do not remove the rod until you have ejaculated - the rod has a hole through it and your cum should emerge from the top. I advise you to urinate as quickly and as often as you can following this and ignore any discomfort. Repeat this for the next three days following exactly the same process. On the fifth day take the final, largest rod and insert the full length of it into your penis. Then take a photograph and send it to me. Do not masturbate but retain the rod in your penis and await my response.
Once the first rod was inserted, he tried to masturbate but found that he was effectively limited to stimulating just the glans. He was scared, turned on and in some discomfort all at the same time. He was surprised just how long it took for the short strokes to bring him close to a climax. It wasn't helped by the amount of lube he had used and the tendency of the rod to move up and out of his penis apparently by itself. He knew that hygiene was important and somehow, he needed an extra pair of hands to keep everything in place while continuing to wank himself. That was it! He began to imagine how this might work with her taking part too.
She might want to penetrate him with her strap on at the same time or ....the semen began to flow out of the top of the rod and he realised he had come. It felt strange without the rush of hot spunk through the most sensitive part of his penis but he had done what she asked of him.
He clicked send on his phone and the picture of his penis with the largest rod only slightly protruding was on its way. During the past four days he had dutifully masturbated while his cock was stuffed with ever larger steel rods. He had learned to live with the burning sensation as he pissed and found it made him think about her each time. His phone pinged. It was a photo from J, a close up of her vagina, and he could clearly see a thin steel rod just below her clitoris protruding from her urethra. The message was terse.
"Come to me at once - I need help inserting the next size and so will you. Love, J"