My parents are very conservative and strict. My sister and I were not allowed to date until we were 16 and even then un-chaperoned dates where rare. Holding hands was ok sometimes, but kissing was immoral. I of course wanted to know all about boys and sex but never allowed to express my curiosity. Anything remotely sexy was taboo. To make everything worse my sister Mindy was a real bitch; always ratting on me for the littlest things and always acting perfect.
Both my sister and I were in an advanced summer school program – no idle minds allowed. We had different schedules so when one of my classes got canceled I decided to go home and spend some time alone knowing Mindy was in class. I got home and went up to my room glad to have the time to relax and get off without worrying about getting caught. I went to close the curtains – never to careful – when I saw Mindy and her boyfriend Jeff out by the pool.
Mindy has big tits with big round dark nipples. Her hair is shoulder length, brown and straight. She has ass and doesn’t have to wear tight clothes to show her figure so she gets lots of looks. I’m smaller with B-cup breasts but they are uplifting with tight proud nipples. My ass is boyish and I have a lot of “friend” but no one that sees me as sexual. I have to wear skirts and blouses or my parents freak. Mindy’s boyfriend was a nice guy, ordinary looking but a wrestler so he had real solid build. He had been seeing Mindy for about 6 month’s and always had something kind to say to me when I saw him. If he wasn’t seeing my sister I would have thought he liked me. Mindy was lying on a lounge chair by the pool with Jeff. Jeff was lying on his side on his lounger facing Mindy; Mindy of course had a look of contempt on her face and totally ignored Jeff. What was shocking was that Mindy was wearing a bikini, which of course would get her in serious trouble; especially being alone with Jeff. I ran to the dresser and got my cell phone, returning to the window to get my evidence. That as it turned out wasn’t anything. Next thing I know, Mindy turns to Jeff with a demanding frown and nods toward her pussy mound, then sets the lounger to a sitting position. Jeff dutifully got up and got down on his knees between her legs as she slouched down with her ass on the edge of the lounger. Mindy pulled her bikini bottom to the side and thrust her glistening pussy towards Jeff. OMG, her pussy was bald – the slut would be in so much trouble. I quickly snapped pictures with my phone. Jeff cupped Mindy’s ass in his powerful hands and lowered his entire mouth over her pussy. Jeff cheeks were sunken and it was obvious that he was sucking her pussy into his mouth while darting his tongue in and out of her hole. He munched away for a good ten minutes without stopping. Mindy was caressing her big tits and pinching her nipples with increasing frenzy. My knees were rubbery watching him and I started fingering my own clit. My pussy was pulsing in little waves of electricity as I stuck my finger into my own hole wanting for my toy. His slurping was making loud wet noises when Mindy grabbed his head with both hands, locking her legs around his head with spasming thrusts as she flooded his face with cum. When Jeff stood up I thought his cock was going to rip his swimming suit. He was ready to fuck her senseless. Instead he stepped toward her so his cock was inches from her face wanting her to suck him dry. Instead the bitch stretched the lounge chair out pushed him away with a look of disgust, and rolled over crossing her legs in a show of dismissal. Poor Jeff, he returned to his lounger and with his slowing wilting cock and lay down.