“Yes son” the mother turned around. He tried not to make a face, but the renewed vigor of the blowjob left him thrilled, weak, and obvious. “Are...you okay, honey” the mother asked. “Yeah, just uuh”, he took a few deep, long breaths, “heartburn. When are we gonna be at the next stop or gas station” he asked faking a calm peacefulness he felt in a way other than what his parents perceived. “It will be a while, dear” his mom explained and turned back around. Behind the drivers seat he raised his. I didn't want to gross them out. But I knew it was too late to go back.The girls stood in the water and finally, Allison said, "Come on. Off it goes." and giggled.Without a word, I reached down, untied the string that holds my swim trunks up, and pulled them down. And I stood there, my pubic hair bristling, and my hard on standing straight out.At first, the girls just stood there and stared. I finally broke the ice."Ok. Awkward moment. I'm on display," I said with a laugh.And then Allison broke. Cassie was raped by her step-brother, and she has never known a cock as big as mine. I love my sister’s tight pussy, and it doesn’t take long for her to warm up to me. Cassie sucks on one of my thumbs, and she moans with every thrust. I reach around, and I caress the small barb that is her clit. My sister enjoys a sweet orgasm, and her young body clamps down on my cock. The first step in a chain reaction that allows me to cum deep inside her pussy.Cassie cums even harder. There’s nothing better. As they walk in, theclerk looks up and smiles. Hey gurls, doing alright? Oh yes thank you,some tokens please. As the tokens are exchanged, the gurls giggle some.The excitement of being dressed up like sluts in a porn store is almosttoo much. They walk hand in hand to the back hall way with booths oneither side. Their high heels are giving the unmistakable sound of slutson the way. They choose a booth and enter. They put all the tokens intothe slot, they will be there for a while. Sexy hot porn.