They had on something like a white tee shirt underneath. No bra so their little nipples where hard and pointed right out. Then came the cheer skirt. T...his was even slower. Working it for all it was worth. Then all of a sudden, drop them to their ankles. Again in unison, kicked over to me with their right foot. Now I see what the have on. It was their gymnastics white leotards.The music changed once again. Now the two where doing a gymnastics routine. Summersaults, cart wheels, back flips. These. We were a little bit interested but had just meet the guy! In the end we said we would all sleep on it and decide in the morning but did agree he was a member of staff at this five star(that was a joke) Hotel Casino and he himself had said what a good job that was and how luck he was to have it . So we turned in foe the night.So we work in the next day had breakfast just chilled out chatting over the night before. The plan for the trip was a full day/night at the Casino. we decided to explore. But she is right, it is a sensational party with every kind of perversion available for women and t-girls only – no men allowed. It is at a great mansion up in Buckinghamshire, owned by the woman who runs the party, and there will be 20 – 30 people there. There is a massive collection of sex toys to try out, as well as a fully equipped dungeon with every type of BDSM piece of equipment.”“Really!” I exclaimed in amazement. “But do you really like that kind of punishment and pain?”“Oh God yes!”. I didn’t mean to see anything, honest!” I blurted out.“It’s okay, Bro. I left my door open a crack by accident; it’s my fault, not yours. No worries.”“Um yeah, sure, Sis, but ... I am sorry, I uh ... should have knocked or erm coughed or something ... sorry ... I kinda got shocked. I wasn’t expecting that!” I stammered.I was reeling with the erotic imagery of my sister standing almost nude in front of me, even if she was now hidden by her door. I could feel the blood in my cock thumping to my.