My "summer of love" happened when I was 17 and my cousin spent those months living with us. It'd been several years since I'd seen her last and now at 15; she was a teen boy's wet dream come alive in the flesh. It was the first weekend, when I saw her in her bikini and all I could think of was how beautiful she was. Walking back from the local swimming pool, I playfully grabbed her around the waist and tried to kiss her. Instead of slapping me, she kissed me back and our hands explored each others bodies. Getting back home (thankfully no one was there) we showered together and with our excitement and passion building, explored each other's bodies. Yes, we had sex. Several times that afternoon.
We fucked liked wild aniimals in heat that entire summer. Every chance we had, we took advantage of. Looking back, I can't believe we never got caught.
Years later, we still keep in touch but haven't repeated our youthfull pleasures.