When my wife was in her teens she used to spend 3-4 weeks every summer at her Uncle's lake place up north. He had a single neighbor in his late 50's and she liked to tease him a bit with her skimpy bikinis when she was sunning on the dock or the beach. He owned a nice pontoon boat and sometimes they'd go out fishing. It was mostly just the two of them as her Aunt and Uncle weren't really into fishing. One afternoon as she was being kind of flirty, she noticed his hard-on under his shorts and was kind of surprised /impressed at his size. They cruised into a small bay off the main lake and she gave him a hand job. She sucked him hard again and they fucked on the boat like newlyweds.
She said it was so different with an older guy because her knew just what she needed and made her cum like she never had with the young guys her age she dated. Being a good Catholic girl she was not on the pill and he didn't like condoms. He would just pull out before cumming... most of the time. Twice the neighbor invited another fishing buddy of his along, an older guys also, in his early 60's. She fucked him also, and the senior guys taught her about DP.
This went on whenever they could get time alone together until it was time for her to go back home. If her Aunt and Uncle suspected anything, they never mentioned it.