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.
Being woken up by someone touching your bare bottom is generally either a very good or a very bad thing. It takes little Lizzy a while before she's sure which it is.
A long story relating to how a boy learns sex after a traumatic experience. It is mostly true. The sex is mostly between the main character and his sister, his girlfriend and her sister. The ages are young so if that offends don't read on.