I was 16 years old at that time. At night we were roaming near the ganga banks when suddenly someone commented at my moms figure. One shouted “Look ...t that ass, it must be yummy to eat”. I was enjoying this kind of lewd comments. Then he came and groped at her ass. My mom was silent. It was at 11.30 and the place was desolate. There were only these three boys with heavily built physique. I deliberately didn’t protest as I was scared and also enjoying at the same time.Suddenly a boy pushed me. "Let me see what it is that's making such a nasty bulge in your pretty blue panties."I walked over to her and stood with my hands at my sides. She reached out and using just one manicured nail, traced the outline of my erection through the panties. "Would you look at the size of your clit?!' she exclaimed. "Whatever am I to do with you? There is no way I can just put you to bed like this. You wouldn't wait for the door to close before you started to play with yourself. I'm afraid I'll have to. .or else” Buddy prompted.Mom falteringly stepped over to her daughter and sank to her knees against her. Richie gripped my sisters head firmly and I heard him telling her several times to keep her mouth open.My Mom, tears in her eyes bent towards my Sister Colleen,s open mouth and hovered her own mouth several inches above it, then Mom parted her lips slightly and the mixture of her saliva and my cum slowly dripped from her lips into my sisters mouth.Colleen started to gag slightly as her moms. The more they touched me and the more hard-ons I felt pressed against me the greater my arousal. It was like I was just a stroke or two from cumming, but I wouldn't let myself.One of the girls came up, pulled me to her, put her hand on my breast and kissed me hard on the mouth. That got a huge roar from the guys, "Girl Show, Girl Show." When I kissed her right back and slid my hand between her legs the guys really went wild."We've got to get this dress out of the way," she said as she striped.