The water was quite cool but my hard-on did not go away.I heard a splash behind and turned around. Mrs. Brown was swimming toward me. She reached me a...d stood up. We were both staring at her breasts. She smiled and said, “The salesgirl was right, it does turn invisible when it gets wet. That was the part that turned me on.”Mrs. Brown kissed me full on the lips and it was nice. Her hand was between my legs and holding my balls. Her thumb was rubbing along my hard-on. Then she said. “I’m not. Mark took both her hands in his and gazed at her. When he managed to recover his voice he said softly, "You are so beautiful, my darling sister. You completely took my breath away."Her eyes lit up and she gave him a dazzling smile. "Thank you, Mark. You don't look bad yourself."With a run of fine, warm weather the school had arranged for a dance floor to be laid on the lawn to the side of the main building. Serena, taking his hand, led him there to a table for eight. They were the first to. Pairings? I made my way back up to Jonas to inquire further."Oh, congrats lil' Jimmy," he offered with a grin."Um, thanks. What sort of pairings were you referring to?"He gestured dismissively with his hand. "Oh, don't worry about it. I got it all taken care of. Worked out perfectly."I was really confused at this point. "What worked out perfectly?"He laughed. "The women's bracket. We needed to narrow it down to three chicks per side, and we had six earn signatures, so we're good. We're gonna. I wasn’t jealous because I had enjoyed her too. Of course all this discussion just turned us both on and we fucked like rabbits.Things got back to normal, well normal for us anyway. The phone hadn’t rung all week but Friday night it did and I expected it was Marge. It was and she told me to be at her shop at 2pm the following day. She gave no further details but I guess she didn’t need to as whatever it was she knew she was in total control. I arrived at 2pm and was immediately sent upstairs.