Yes let me think about it. He suggested few names half-heartedly and he himself disposed them. At last, he said how about your sister.Me – are you m...d, she is my own sister, how can I think this way, I protested (pretended).He – see already you have seen her nude and you have even touched her, her boobs you have almost enjoyed her except fucking, why don't you go for her, she is a real babe, you can't find such a peace anywhere else.Me – I am not sure is it ok? still ... I paused.Jiju – don't. He eyes got wide as she realized what I was doing, but she quickly composed herself and acted like nothing was wrong, as we all continued our conversation.Completely hidden by the bubbles and motions of the hot tub water, I gently grabbed her now swelling clit and slowly jerked it off in between my thumb and index finger. I went slowly and deliberately, so my arm wouldn't look like it was moving, and to really build her up. Pretty soon she was biting her lip and trying to cover up her shallow. Thump!!!!!, went the door as mom banged against it expecting it to be unlocked then desperately tried turn the handle to no avail.“Who’s in there?, is that you Stu?” mom asked, jigging up and down on the spot, her motions making thudding sounds on the carpet outside the door, her heart sinking knowing that the only toilet in the house was engaged“Yes! ... why?” I asked, not knowing the reason why mom was making a fuss.“Oh ... shit!” mom groaned, “How long are you going to be? I need the toilet!. He and his friends could hide behind the d****ries and watch our antics during the sleepover. Each of them would have to bring their dirty jock straps, making sure each had their names on them.When the girls arrived, everyone carrying their blankets and pillows said a few words to my parents before heading downstairs to the game room. They clamored down the stairs and everyone chose their spot on the couch and started stripping off their clothing and put on their sexy negligees while I grabbed.