Slowly I kiss my way back up your body, as I do this I slide my cock inside you making you moan. You bite my lip a little bit but the moan still escap...s from your soft lips. I gradually get harder with my thrusts until you can’t hold back any longer and cum all over my stiff cock. Moaning and screaming, not caring if anyone hears us. The thought of us getting caught sends me over the edge, I cum deep inside of you. We embrace each other for a while before returning to our seats with huge grins. I felt like I could cum right then and there. She kept her mouth open so I could enjoy the sight of my manhood slowly sliding along her tongue and into her waiting mouth. As the head of my cock reached the tip of tongue, my sister quickly flicked her tongue just under my piss slit, right where all the nerves end. I watched as my pre-cum flowed out of my shaft onto her tongue. Some of clear jiz found its way into her mouth; some ran along the sides of her tongue, dripping off the sides of my. Then my hips came up off the bed as my entire body went rigid for a short time. The orgasm in my belly shot through my whole body causing it to shake and quiver, then I slumped back on to the bed."What are you doing to me?" I begged."Do you want me to stop?" he queried in return."Noo, don't stop. Please, don't stop." I moaned.He moved down my body. Licking and kissing his way to my belly button. Around it and then stabbing his tongue into it. The fire rekindled. Down my right outer thigh to the. “How many?”“How many what?”“How many... , “ her voice trailed off, mascara-stained eyes dropping to the floor once again, “spanks?”“I don’t think it would be right to negotiate that in advance. I think you’ll just have to trust that I give you an appropriate but not excessive punishment.”She was silent.“You can stop it whenever you want,” I said, “but if you do, the deal is off of course.”She bit her bottom lip for a moment, furrowing her brow before she mumbled “ok.”“What was that?”“Ok.”“Ok!”.