When I was around the age you get a drivers license at for the first time, and so was my GF at the time, we went to the lake with her whole family. I had only been with her a month. She was wearing a pretty skimpy bikini (or maybe she just filled it out well). Her and I went out to the lake, not too far, mind you, by ourselves; the water barely started to cover our wastes. We looked back at the shore, and it seemed far enough, so we immediately started fooling around. I put my finger under her bikini panties, rub her pussy and start finger-banging her until she deeply cums. We then go back to shore, I shake her dad’s hand and smile at him. Once again, it wasn’t that far away from shore. Part of me wishes he saw…