This whole scene was turning me on unbelievably and my panties were now soaked with my juices. I slipped my fingers into my love nest and began the familiar fingering of my clit I had practised alone late at night. Meanwhile as I spied on my sister and her boyfriend I could tell they were really getting into it. Sandy was rocking back and forth on her hands and knees meeting every thrust from Dan's big cock. As he would withdraw almost to the point of slipping from her love box I would see much of his hard cock glistening with her love juices then he would plunge it back in. All the time he was hold her by the hips. Sandy was moaning and telling how good it felt, urging him to fuck her deeper and harder. They kept this up for a few minutes with the pace gradually increasing. Sandy was thrashing her head about, her lovely wavy blonde hair hanging down around her face. Her boobs were swaying back and forth. They were both sweating and moaning. All of a sudden Dan tensed and held Sandy tightly to his cock moaning that he was coming. A moment later Sandy too began to come. I too could feel my orgasm building to the point of no return under the stimulation of my fingers and the scene through the slightly open closet doors.

After a few moments Dan and Sandy collapsed onto the bed temporarily exhausted. I could see Dan's cock now red and limp hanging across his leg. Sandy was laying beside him with a leg over his and because of my position opposite the end of the bed I was looking right into her open cunt not six feet away. Dan's cum was leaking from her pussy and down her leg.

I was fascinated by the scene but at this moment disaster struck or as events developed another stage in my sexual education. I was feeling cramped and shifted my position knocking over something in the closet. There was a tremendous crash. Both Sandy and Dan were startled. Dan grabbed a blanket from the bed to cover himself. Sandy got up and without the least concern for her nudity proceeded right to the closet where I was hidden. She flung open the doors. There was nowhere for me to hide now. I had been found out and must face their wrath. Sandy grabbed my wrist and dragged me from the closet. She demanded to know why I was there. She ranted and raved at me accusing me of spying on them and being perverted. I started to blubber an explanation but she told me to shut up. After a few minutes of yelling she began to calm down.

Dan hadn't said a word and simply watched us and protected his modesty with the blanket. Sandy turned to him and began to muse aloud what they might do to teach me a lesson for spying on them. All of a sudden she began to laugh at Dan. "Why on earth are you spending so much time covering up when she just watched you eating me out and fucking your balls off?" she asked rhetorically. Then she announced she had an idea what I might do to atone for my spying on them. She decided I should put on a show for them. She told me to take off my clothes. I didn't move. I was shocked at the prospect of undressing in front of a boy and the way she said it made me even more nervous.

Sandy took my hand and lead me around to the side of the bed and made me stand in front of Dan. She told me she would help. For some reason I didn't even resist. I didn't wear a bra most of the time when I was young because I found them constricting especially when playing sports. Sandy still nude stood behind me and slide her hands up under my tennis T-shirt. She covered each of my breasts with one of her hands and began to massage them. I should have pushed her away and run but I didn't even move or protest. Dan was watching eagerly. Sandy told him he would like my boobs they were nice and soft but firm. Sandy's hands felt good. After a moment she said Dan deserved a look so she slipped my top over my head and continued to feel my tits stopping every few moments to tease my little nipples. They appreciated her efforts and stood to attention. Sandy reached down and took my hands and told me to try. I did as directed without thinking.

Sandy now reached down and slipped my skirt over my hips and to the floor. Still standing behind me she started to massage my pussy through my panties but quickly discovered how wet I was. She told me I was very naughty to be so turned on by all I had seen and explained to Dan that my cunt was soaking wet. She slipped her hand inside my panties and began to stroke my cunt and clit. I was getting higher than a kite despite how evil I knew what I was doing was. Dan was mesmerized watching what Sandy was doing. Sandy in order to work her hand more freely slipped my panties down. I was now as naked as she was. Sandy asked Dan if he would like to fuck a nice tight little virgin and he nodded anxiously. His hand was under the blanket and Sandy could see he was playing with himself. She grabbed her dressing table stool and placing it next to the bed told me to sit down and spread my legs wide. My cunt was now wide open for Dan to see not more than four feet away. Sandy took my hand and told me to take over fingering myself. Again I did as instructed as in a trance. It certainly felt awfully good. I didn't care that what I was doing was naughty or that a boy was watching me do it.