The Sister 3

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This work is intended for ADULTS ONLY. It may contain depictions of sexual activity involving minors. If you are not of a legal age in your locality to view such material or if such material does not appeal to you, do not read further, and do not save this story.
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Part 4

“You’re about to become the luckiest boy alive” Mary told me, “because you are going to be the first boy ever to fuck me, and I just know I’ll be the first girl for you as well.”

Having said that, Mary lowered herself down onto my mouth and told me to get licking and warm her up. As I did so I felt her hands on my cock gently stroking it until it was as hard as it was going to get. Mary then wrapped string tightly round the bottom of my cock explaining that would keep me hard for her and stop me spurting and how that was very important so that I didn’t put a baby inside her. That string really hurt and didn’t do much to make me feel lucky at all.

The preparations having been completed, Mary turned to face me and holding my cock carefully lined it up to her sex, moving it around a little and coating it in her juices. Very slowly she sat down pushing me inside her until her legs were resting on the very top of my thighs while her bottom was doing a good job of squashing my balls against the block of wood under them. Once again pain vied with pleasure. My cock was being gently squeezed by a wonderful warm wet sleeve which sent ripples of pleasure along its length while my balls felt like they were being destroyed by Mary’s bottom.

Mary took a while to savour being filled by her first ever cock then very slowly raised herself back up until I was only just inside her. Mary slowly lowered and raised herself up, resting for a couple of seconds every time she felt her bottom squashing my balls. Despite the pain, I was ready to spurt within five cycles and then it happened. Expecting intense pleasure, the pain was even worse as I felt I had been kicked in the balls. Mary grinned down at me as I screamed both in pain and frustration.

“That was wonderful” Mary told me, “your cock really swelled up for a bit then.” “I wonder how many times we can make you do that?”

Mary started to bounce up and down faster on my now very sensitive cock. Small mercies are welcome and at least she wasn’t squashing my balls every time she came down, although when she did come down far enough they really suffered. Mary altered her position so she was almost lying on top of me. Her nipples rubbed against my chest as she rocked against me, my cock completely inside her. Her fingers found my nipples which she squeezed and pulled making me cry out. Twice more I tried to spurt with agonising results before Mary starting moaning loudly and my cock felt like it was in a soft, wet vice. Then it was Mary’s turn to scream out, but hers was a scream of pleasure rather than pain. She grabbed my head in her hands and kissed me forcefully her tongue exploring my mouth. Finally she relaxed, untied my hands, and told me to cuddle her.

We must have cuddled for about half an hour before Mary finally got off me and untied the rest of me. She had us lie together in the soft grass stroking and kissing each other. I shuddered in apprehension as one of her hands took hold of my balls and gently rolled them in her fingers.

“Don’t worry, I’m not going to hurt them” Mary told me

I relaxed as much as possible and tried to enjoy the feeling. Her hand moved to my cock which had been soft since she’d taken the string off it. Almost to my amazement her gentle fingers soon had me hard again. At least that was still working. I soon felt that insistent urge to spurt, and begged Mary not to make it hurt again. She just grinned at me as she took me over the top and set my fears to rest. It was as wonderful as the first time and did a lot to relieve the dull ache in my balls.

(The End)