She started sucking my earlobe, which drove me absolutely nuts, then her hands left my ass and grabbed my small breasts and pinched my nipples through...the tight fabric of the costume. I moaned appreciatively. "Oh catgirl, you are a horny thing aren't you? You want him to fuck you instead?" She whispered.I shook my head no. I had already sucked so many cocks, it didn't phase me as cheating on Conner anymore, but fucking was another step that I didn't want to take. "I have a boyfriend." I. I finally managed to pull away. "Hey, no fair!"She giggled. "Tell me you didn't enjoy last night." I flushed, and tried to withdraw into the blanket. "Well?" You damn well know I loved every minute of it. God, I never believed that I could feel so..." So aroused that you lost control and followed your instincts?" I nodded."So does that mean I'm a lesbian?"She gave me a contemptuous look. "Hell no, girl! It just means you can accept stimulation and pleasure from another woman. Did Little Greggy. Bro...." Yep. She was trashed, totally.I managed to get the two girls to stand up and keep my mind on the task at hand, namely rescuing them, and not on their luscious nude bodies rubbing against me. I grabbed what I could find of their discarded clothes, which thankfully surrounded them, and pulled them with me into a nearby bathroom. Just before I closed the door, locking it behind us, I heard my big sister announce, teasingly, "OK, who gets to fuck me first?"Oh, God, I thought, my big sister. I pulled my top up and over my head to leave me naked. I was focussed totally on looking into Gemma’s eyes, watching her masturbate, forgetting there were other students close by. Surely, we had been seen. I slipped closer to Gemma, opening my legs wider, before beginning to tease my clit. Hearing Gemma moan more and more turned me on further, not realising that I was moaning as much as her. My pussy throbbed so hard as I teased my clit, body writhing as was Gemma’s, both looking at the other..