"Yeah, nice looking girls all right," I replied. In truth mum and her two teenage daughters were more than all right."Let's see what sort of boat they...got shall we," I said.We downed our beers and followed them at a distance, to the visitor's area, right at the end of the pontoon; they all boarded a large Motor Cruiser. Looking at its hull design, I could tell it was built for comfort and not for speed."What do you think?" Trev my other brother said."I think we may be in business," I smiled at. Would you do something different? Would … would you use your mouth and tongue down there?” she pleadingly requested. It took a couple of seconds to register what she was asking before I answered, “Yes, I will.”This was a new experience for me so my movements were slow and deliberate. I started with my tongue at the bottom and slowly worked up to the top. Gwen made encouraging sounds and pushed up into my tongue as I progressed. When I first touched her clit she squealed and squirted. Her juices. Amy must have worked out because she kept this up for almost five minutes, before she leaned forward, put both arms on my chest, and moved her ass up and down. She began a soft squeal with every thrust, which built-in loudness as her thrusts became closer together. Finally, she went vertical again and started rotating as before."Don't be scared," she gasped, and let out some loud shrieks while holding her breasts with both hands. It was one of the loudest orgasms I had ever seen and must have. "You know how computer illiterate I am," he lamely volunteered.Dad frowned at Uncle Tim, but my glaring stare at him, let it him know I would have killed him if we all were not in the same room. I carefully gave everyone a heaping helping of scrambled eggs, but slapped them down on Uncle Tim's plate, spattering them on his lap. My brother, Steven, almost fell out of his chair laughing seeing me slop Uncle Tim's plate.Feeling better now after my outburst, I sat and we girls all chattered amongst.