God, it is making me feel horny”. I tuned my hearing away from the radio and the engine, and there it was, the steady rhythmic “slurp, slurp”, ...nterspersed by a lapping sound and then a low groan. I didn’t need Mary’s hand on my thigh to start getting hard myself, but it helped, and realising how I had reacted to the sounds, she stroked me through my trousers. “Shhhhh…..”, she whispered. I felt my zip being pulled down and a cool slim hand reach in to pull my hard cock out. It wasn’t. To push her breasts against his fingers."I really want to see these," he said."You've seen them before," she said, her voice tight."You know what I mean."Her hesitation was only because she was having a hard time speaking at all. She felt strangely out of breath."Okay," she whispered.She didn't do anything. But that was okay, because he didn't mind lifting her shirt, and then making her arms go upwards while he pulled it over her head. She thought she must be insane as she worried about her. At the same time I could feel her internal muscles working hard gripping and massaging my penis. I finally let out a loud groan and then a yell and thought I was going to pass out from the sheer intensity of the feelings as my first orgasm hit and spurt after spurt of sperm shot from my penis. Aunt Jen held me tight as my orgasm slowly subsided and we both basked in the afterglow. I don’t think Aunt Jen actually came but it was not something I knew about or was in any state to think about at. She still had a death grip on my hard cock. But now as things got hot, she was rubbing the head against her pussy through the material of our few clothes and grinding against me.She was horny, and it was obvious she was tired of waiting. We eased over to a smooth rock that was just covered by about a foot of water and she pushed me back on the rock pulled my shorts down and pulled her bikini bottoms to the side. I caught a glimpse of a beautiful lil shaved, pink, angry pussy then she was on me,.