When I was a teenager, 17 years old, my family had a ski boat, which we used on many summer weekends and evenings. We lived close enough to the lake that we would often go water skiing for a couple of hours when Dad got home from work in the evening. It was during one of these short, evening ski trips that the experience I'm about to tell you about happened.
If I'd known what a lesbian was I might have been less confused, but in those days a fourteen-year-old girl would never have heard of such a thing. As it was my new step-sister's behavior seemed mostly baffling.
This time I cuffed her to the bedpost and I ran my hands over her hot skin while she writhed about unable to get loose. My cock was really hard in my pants.
14 year old Richard and his 11 year old sister Penny are spying on Betty, their mother as she bathes. When Betty finds out she sets them down for the "birds & bees" lecture. But what happens next is a sexual lecture in the nude, showing the function of all the different body parts.