There was only one other woman in the changing rooms. As I peeled off my tight gym crop top I caught her glancing over at my large pert breasts. By th...s point, my nipples were stiff and poking out.I then slid my skimpy shorts down and stood out of them so I was standing totally naked in the changing room pretending not to notice the other woman look me up and down, her eyes lingering on my long pink pussy lips which were moist and swollen because of the naughty thoughts running through my. The Headmaster at Ponteland Comprehensive, where I’d been teaching since January, was desperate for his school to do well for once; but Mr. Winnet who was meant to be in charge of a team of four had hurt his back so I was corralled into spending four days climbing hills, canoeing, orienteering and walking through rivers with three hormonally challenged 15 year olds while getting paid for it! I already knew the three boys in the team from my time as their stand-in Maths teacher and hadn’t. “Hi dear. How do you feel?”I was pretty annoyed to be honest. Didn't love when I was interrupted in the process. Without waiting for an answer, my mother continued:“Aunt Rebecca asks for help.”In fact, she was not my aunt, just what my mother called her. Rebecca has been a close friend of our family for a very long time. She often stayed at our house and I had a pretty good relationship with her. Well, almost like with a real aunt, except for the fact that sometimes I got pretty horny talking. After the fuss Mel had made that morning about me watching her peeing, even though I hadn’t really seen anything, that was the last thing I was expecting.One of my semi-regular assignations was a big fan of water-sports. They didn’t do much for me but I accommodated some of the woman’s milder fetishes, such as peeing on each other in the shower, because of how turned-on it made her: she’d practically rape me afterwards.Mel’s look hardened to a glare and her hands positioned themselves on her.