The seventeen year old sister would take care of Fay's child also when Sylvia and she went somewhere.They spent a lot of time on the beach.Both of the...m were becoming tan all over.Silvia wore tops that gave me a look now and then at most of her tits, they were tanned all over.Fay's body was tan all over.I figured they were finding an empty place on the beach and getting bare ass.I found Silvia there several times when I came home from work.I noticed them exchanging a kiss when they thought I. My family came to the same Motor Camp every summer holidays. Every year since I can remember. We had a caravan that we kept there for a small yearly rental.The camp adjoined the beach. It was set under palm trees that gave the campers some shelter from the hot summer sun.The beach was set in a small bay that was a popular recreational fishing spot. There was also wind surfing, boating, water skiing, all available from the beach concessionaires. A real family holiday spot.I had just turned 17. "I...I wasn't sure what that was and..." I stammered. " I am sure you did know because I didn't see anyone come into my room after I walked out so you must have been in there the whole time honey." I must have looked like I was going to pass out and I felt like I would too. Grandma walked over and sat me down on her bed and sat beside me. She took both my hands in hers and looked me in the eyes and asked "How much did you see sweety?" I was about to start crying but she just said "I don't have. )Next day I asked her best friend what did my sister do last night and she told me everything in detail:They started making out, then he was touching her legs, at first very soft but then very roughly, she liked every second of it, then she started grabing his bulge but quickly he took his penis off so she could grab his hard on in it’s entirely, her friend says that she saw them since she was with other friends close to her, she says he had a big big cock with a big juicy head and that my.