Seeing Dave in pure bliss, Lucy began to do as she intended. She started smacking his balls and bit all over his body. When the pain seemed to great, ...ucy would fuck his ass with the vibrator slow at first then as fast as she could go.When Dave was enjoying himself once again, Lucy nibbled hard on his cock and balls. Wincing in pain, Dave struggled to move. Each move however caused the vibrator to move slightly in and out of his ass bringing back more pleasure. Lucy took her teeth off of Dave's. "Oh yes. I am Jane, his sister, and you are?"Rosa's face lit up and she had a big grin on it."I am Rosa, his stepdaughter."Jane's smile got even bigger and she hugged Rosa."Come into the back and we can talk! You too Justine!"It was not a request and my old habit of obeying Jane kicked in.Reluctantly I followed them into a back room. I knew this did not bodewell for me but I was at a loss trying to figure out how to get out ofwhatever they came up with."Do you mind if I call my mom?" Rosa. And nothing happened. As the next day, and then the next passed and I didn't become ill, I was more and more relieved. Confident that I had not injured myself, I began to think about what had happened, and ultimately about how good it felt. It was then that I realized that what I had done was what I had seen others mimicking. Their fists at their crotch making an up and down movement now made sense to me. And it was normal, and harmless. And as I had discovered on my own, it was also fun.. I gave a small groan of despair as I found both girls, staring open mouthed at my groin. I looked down to find my cock was pitching a massive tent under my tights. The outline of its shape and size was obviously defined under the skin-tight material as I placed both hands over my groin in vain to conceal my embarrassment.'Look, I'm very sorry,' I mumbled as both girls eyes travelled upwards to stare at my toned, athletic body instead, 'I didn't mean to spy on you both, I just didn't want you to.