After that first time with my aunt I lay in bed touching myself and thinking. I found the touching very enjoyable. It was a little journey of self-discovery that went deep into the night. I probed my vagina; stroked and caressed every millimetre of my vulva, thighs and buttocks; explored the length of my slit; pushed my index finger into my anus while I indulged in the delights of clitoris stimulation. I experienced my first orgasm that night; staring wide-eyed into the darkness as my body spasmed uncontrollably. Eager for more I kept rubbing and rubbing my clitoris - pushing myself into that unique feeling of ecstatic pain that follows on. Unwittingly I made my self endure a little of what I had put my aunt through. A gleeful understanding grew in me, and I wanted more. The next day at school I sought out my closest friends. In a group I told them some – but not all – of what I had experienced with my Aunt and then afterwards on my own. Most were fascinated and excited and expressed an eagerness to experiment (my enthusiasm must have made it all sound very attractive) but one, 'K', expressed disdain and was dismissive of the whole topic. A little annoyed I suggested she wouldn't be like that if she'd felt it like I did. I proposed that she was jealous. She disagreed, vehemently, and pushed me away. It would be an understatement to say that I was the most popular of this group and so, when I suddenly shouted "Get her!" the others (three) jumped on K without hesitation and gripped her firmly. I put my face close up to hers and said to the others while staring up into her eyes "let's do her". We were in the corner of the school yard and no-one noticed as we dragged the struggling girl into the dark space behind an outbuilding. The others pinned her against the wall of the building as I straight away put my hand up her skirt and slid it into the waistband of her panties and down to her bare mound. It was difficult doing anything else though as her panties were high, I was small and couldn't really reach properly. Her thighs were clamped together; and she was struggling, and all the while spitting out "Stop it! Stop it! Get off me!" Interestingly though, now I think about it, she never shouted for help... Feeling a little frustrated I pulled my hand out of her panties and slapped her hard across the face. She instantly went quiet. Tears welled in her eyes. I mocked her. "Cry baby" I smirked. "Cry baby". I cruelly pinched her arms; then her flanks, through her blouse; then I pinched her, humiliatingly, on her nose. We all laughed and giggled as she howled in pain. I felt that same thrill I had felt with my aunt. I didn't want to stop now. I wanted to hurt and humiliate her more. "This is what you get for pushing me" I chided her. Then I crouched down, reached up under her skirt, and pulled her panties down and off. The others, still gripping her tightly, laughed and mocked her again "No knickers! No knickers! Let's have a look". I lifted her skirt and they, still holding her, bent around to look at her nakedness. She was crying hard now. Great sobs racked her body as tears flowed down her cheeks. "Aaah" I laughed "she doesn't like it. We'd better do something she does like then". I put my hand between her legs. One of the other girls giggled saying "Go on Pip. Do her" I started to run my fingers gently along her slit, trying to seek out that hard little point. She squeezed her legs together in an attempt to stop my eager probing. "Don't do that" I shouted "open your legs" and I hit her, hard, across the front of her thighs (lovely). She yelped, and I did it again (more lovely); another yelp. "Now open your legs or I'll do it again" I insisted. Slowly she spread her legs. Two of the others with a free hand reached down and held her thighs apart. I put my hand back between her legs and started to stroke her again. It felt so good. She was helpless and humiliated in front of me. Half naked. That feeling of power again. It was fantastic. As I continued to stroke her she stopped crying. She was staring into space, her mouth opening in something like astonishment. I felt a little slick moisture on my fingertips. It reminded me of my aunt – although she was much wetter – and I knew what K was starting to feel. I felt her hips gently moving with the rhythm of my hand. I mocked her again "Ooh she likes that. She's enjoying it now". We all laughed and giggled as I did it some more. Her cheeks went bright red but she didn't say a word. I started to move my hand faster, rubbing, rubbing. Her mouth opened wider as she bent over, straining against the three girls holding her. We all giggled again as she swivelled her eyes to look at us in turn - grinning broadly at her humiliation. Her body started to tremble. Abruptly I pulled my hand away and said "let her go. I'm bored now". I turned on my heel walking briskly away. As her skirt fell back down, covering her nudity, the others released her and she unceremoniously fell forward – helped by a mean push from one of the group. We all laughed again as she fell awkwardly and I, twirling her panties on my fingers shouted back to her "you can have these back tomorrow if you ask nicely"...