My girlfriend bought me a black silk thong for Valentines Day and to be honest I was a bit nervous as I thought it was just for a laugh but just so happens she liked them and had a thing for teasing.

I had to wear the thong that she bought me for that night and to be honest it felt quite nice. I’m slim build so I didn’t look out of shape in it, as I don’t think she would have bought me one in the first place.

So she came in wearing a nightie and a g-string, which she knew I liked on her and sat me down cuffing me to a chair, and then basically teased me in more ways than one. Now my underwear didn’t leave much to the imagination anyway and I felt quite exposed. She spent most of the night teasing me in her hot outfit until my thong was so tight it was unbearable but in a weird way I was quite turned on.

Anyway she liked what she saw and decided to climb on top, and then basically began rubbing her silk g-string up and down my bulging silk thong, which felt amazing! I was so turned on by then all I could do was look down and watch her rub up and down my bulge, which pressed way too tight against my thong as silk isn’t stretchy. The fact that my cock was facing upwards and pressing up against the silk material made her slide up slowly to the very top of it and back down slowly again, and all I could do was watch and feel her doing this to me.

While she straddled me I could see her enjoying watching me looking down at my bulging thong being rubbed and watching me gasping as I looked at it being taken advantage of. As a result this made her tease me even more. By now I was absolutely throbbing and looking at it being rubbed slowly up and down with her g-string was near torture. She knew that she was giving me a lot of pleasure from this.

By now the shaft of my cock pressed really hard against the material and my silk thong tightened while she continued to rub her g-string over it. She then looked down at my thong getting tighter and told me she could clearly see an outline of the tip and shaft of my cock along the silk. She said seeing it turned her on and then pressed harder against it. I had no way of controlling it now as I watched her g-string slowly creeping up the shaft of my thong and slowly up to the tip. I started to pant as she done this to me while she slowly went back down the shaft. I looked at the tip pressing against the silk as it was throbbed. I was convinced I could see my cock pulsing as I watched and felt her g-string rubbing up and down the shaft again. At this point I was so turned on I automatically started to thrust my cock as she rubbed up and down my shaft as if it were begging to be released.

By now the silk material around the shaft and the tip was extremely tight which made the feeling of her silk g-string running along it quite intense. As we both watched her sliding up and down me the material at the tip started to soak through as I became more aroused and she noticed that she was gradually making me wet.

To top it off I looked up and saw her hands reaching for the tie, which supported her ample breasts in her nightie, which was very tight at the front, and I could clearly see the outline of her nipples through the silk. She pulled the lace tie slowly as the front of her nightie began to open and her bare breasts were revealed. I gasped as her breasts rubbed up against my chest as she moved up and down my cock. I was absolutely aching and she kept going and going as her g-string rubbed against my shaft continuously. I was getting so much pleasure from this that I began thrusting my cock against my thong uncontrollably and moved it up and down to feel her sliding over it even more. She looked down as her body rocked back and forth and could see the shaft up against her g-string. My thong was now soaked and too tight to hold in my cock as she slid up and down it.

The force of her rubbing my bulge and my thrusting had made the tip appear above the waistband. It was swollen and pulsing as she looked down at it and pulled my thong downwards revealing the rest of the throbbing shaft as it begged to be taken. As I watched her pull her g-string to one side I started to pant uncontrollably as I knew what was going to happen next. She then sat right on top of the tip and squeezed slowly down the shaft and I gasped as my body arched back while she plunged it all the way in. finally she un-cuffed me and without wasting time I took over by grabbing hold of her and forcing her back and forth plunging myself deeper inside.

It was a weird but quite an erotic experience and the best chair sex ever.