I was 19, hanging out at the lake house with my parents. Jennie, a year younger, was a very attractive daughter of my parents’ friends. This summer her parents needed to work, and she stayed with us at the lake house. This was before phones and social media, and we would read, take swims in the lake, have a snack and read some more. I had my eyes on her for some time and struggled many times to hide my lust for her, and yeah, to hide my erection. I think she was aware, and enjoyed the attention.
Whenever we were by ourselves by the water for a moment, she always seemed to make her bathing suit ride up a little higher between her cheeks, revealing more than usual. Other times she was sunbathing in very revealing positions, either unaware of how aroused it made me, or more likely showing off. She was a popular girl in school, and being a bit of a nerd, I just assumed she was out of my league.