Our noses were touching, our breaths were shallow. Then our lips met, and we kissed. Soon we weren't just pressing our lips together. As if of their o...n accord, our mouths opened slightly. Our tongues darted tentatively out, licking, probing. I gasped when I felt Didi's tongue suddenly plunge into my mouth. Her hands grabbed the sides of my face as she pulled me to her in a deep soulkiss. Her urgency triggered mine and I got instantly hard as I passionately kissed my sister. My hands moved. There was a splash and they all turned to see the teenage boy swimming towards them, the wife proudly proclaiming it was her son.As her neared Helen could clearly see he was not wearing trunks, as hid bar bottom showed white on the waters surface.He was young but as he emerged from the water Helen got a shock, his penis was around ten inches and fully erect.Her eyes opened and she exclaimed, 'Oh my God', as he walked up to her and stood between her and his mother.Helen looked at them all in. To pierce her cock to prove that it was owned."A permanent piercing is a big commitment, pet," she had said. There had been a tone of caution in her voice that I took to mean that she thought it was too soon."I'm sorry, Mistress. I don't want to rush things. But whenever you think the time is right, I would love to wear a ring for you."She had looked thoughtful for a moment. "Are you sure about that, pet?" Yes, Mistress. You can... I mean... whenever you're ready... umm... you can just go ahead. While she did this her other hand glided over my ass, her fingers occasionally slipping between my cheeks. She stooped and took my cock into her mouth. Her wet hair sticking in strands to my belly and thighs. Her tongue was doing orbits around my cock head and the sensitive skin of my glans. My legs began to shake and I felt that I might collapse to the floor if she continued. She sensed my imminent release and let go of my cock and it slid from her mouth. She stood and kissed me again. This.