While he got the rubber on, I bunched my skirt up in my left hand to keep it off my arse and used the other hand to scoop liberal amounts of lubricant from the container to spread first around my sphincter, allowing my fingers to slip in a little, then over his throbbing, latex coated erection. Placing the container on the floor, I turned my back on Andy, who was now sat on the edge of the bed, and reversed between his legs, still holding the skirt up and my right hand still on his cock as, looking in the wardrobe mirror as I did so, I lowered myself down on to his shaft. I was no virgin to anal sex, but neither had I ever had it on a regular enough basis to loosen me up significantly, particularly in the few weeks preceding this session, so although he entered smoothly the first time, it was nevertheless a very tight fit, particularly as he seemed a little thicker than what I was used to. To begin with it was even a little painful, but it felt so good to be filled up there that I could ignore it, and after lifting up and down a few times it soon subsided completely. I released both his cock and the skirt so as to steady myself on his knees either side of me, with the added bonus of hiding my erect cock from view in the mirror that now showed a school girl clearly enjoying impaling her arse on a big throbbing cock. As always, though I felt I was getting better and lasting longer, this position used muscles that did not often get used, tiring sooner than I would have wanted as a result. .....