.wow are you good at swimming.?She replied yes…she had a good female trainer and learnt well.Is that all uncle you can ask….?? I said what more…...she said about my body….tell me about it…I said well…if you want ….she said yes she wants to hear from me. I told her she had a full mature body and any man will marry her. She said if you were young would you marry me….I said surely why not, you are intelligent, young and good person. But I am already married etc I reminded her.She said its ok, she. After a couple more strokes, my sister removed her towel.I noticed my sister has some great tits, very firm 36Cs.Then with one hand on my cock, she used her other hand to caress and rub her tits.I couldn’t believe it. I swear I was watching a porn movie.Then my sister did something I still can’t believe. She lowered her head down and licked my cock from base to tip.I watched as my sister then slid my cock in to her mouth and proceeded to give me a blowjob. My head was in a fog!My sister only. . Butler drove, oblivious to everything but the road, ignored us completely. Several minutes and several fantasy interruptions later, I became suspicious of Mr. Butler’s motives. He was asking too many questions about my “diving” activities with the three boys. This was an hour drive and I was tired of the interrogation already. But then I realized that he was turning to talk with me just to take sneak peeks at my body. I was partially covered by the towel on my lap, but the narrow tube. I heard John say to the blokes they are probably having a break Jo’s phone vibrated on the table next to us, It was a text from John asking if everything was ok and whether we had had enough, Jo showed it me and said what do you think, erm well I started, but she interrupted me by saying I’m certainly not finished but we can call it a day if you want, I shock my head and smiled, thought as much she said giggling, she text him back, they haven’t finished yet they are just having a breather.We.