Letting Marvin to adjust the new level of ass dilation and thinning.The guy in the other booth had finally succeeded in having Marvin’s entire cock ...up his ass and now he was pressing his ass very, very hard into the wood of the glory hole, smashing his balls with the process. He was alternating with grinding and long deep thrusts up and down on Marvin’s cock to get the fucking he needed and Marvin had no say in it. After every couple of pumps on Marvin’s dick, he would take a very deep down. I happened to push it and with a clattering noise it tumbled on the trunk and then down to the ground. Immediately the dog lifted his head and barked. I knew I had been spotted, and in order to prevent any further trouble I stepped out into the opening and said I was sorry I had disturbed them, and that I would leave as soon as I had packed up my little bag. The woman let out a little scared whimper and the dog stood 'en garde' close to her."Never fear, dear. I shall do you no harm. I was. Carry on.” Already semi-aroused by the story, I was suddenly catapulted into a full erection by my mother’s obvious interest. Mom was dressed in shorts and a t-shirt. She let out a throaty chuckle. “It’s hot in here, isn’t it. We ought to turn the AC up.” She got up from the couch as if to do so, but instead stripped off her t-shirt. “That’s better.” She was wearing a pretty white bra with lace trimmings. I’m not an expert on lingerie, but it looked to be aiming for sexy more than. I mean, we can't walk around with a sign or anything. Yes, I think that will be best, just be casual." Answered Liz. "But don't worry, while we're checking them out, they'll be checking us out too. Especially you as your big cock bounces off your thighs while you're walking." Sounds like a plan." Responded Gene, "Here's the parking lot."They got their stuff out of the car and headed down to the beach. (Note: In Mexico the beaches are not legally clothing optional, but by local convention, there.