After a moment, my mouth was watering and my own little penis was stiff as I jerked off.Suddenly Brian started peeing, and it was obvious he had been ...holding it for a while. His piss had that strong flavor that comes from sitting in the body for a while. Nonetheless I gulped it gratefully; glad to be used, turned on by the continued humiliation of the evening. When he was almost done, he pulled out, saving his last spurt to spray the new panties.As he zipped up, he told me to put the white. He had eased himself down onto the water so the bubbles were over his chest, but just where the top of his shoulders appeared, I could see a gentle tense and relax, tense and relax. It was as if his arm were moving with a regular rhythm.I thought, no way, not here - but the movement was definitely there.He was jerking off! Right here in a public pool, with me sat barely three feet away.I didn’t know what to think. My mind was racing, but my body didn’t move. As I’d twisted I’d accidently placed. Ever!A few minutes later, Olga and Susan walked back into the room, side by side. Both kids were surprised to see their mothers acting so chummy.Olga said, "Susan and I were just talking. We realized it probably was time to go our separate ways now, since we've got different things to do. So we'll give you kids a few minutes to say goodbye."Susan nodded. She was beaming. She said to Olga while still staring at the other two, "Just look at them. Look at the two lovebirds."Olga was all smiles. Thanks, Rose. I’ll send you a picture. Hurry up and come home so we can do it. Love you too.”Todd snapped a picture with his cell phone of his cock embedded in my pussy and sent it off to Rose. Rose must have quite a collection of pictures of me having sex with her brother by now. Having Todd all to myself for a couple of hours like today didn’t happen that often. Todd only slept with Rose. Never me. When Rose was home, Todd would only have sex with me if Rose was there, which was fine with me..