“Mmmmmm,” Mandy hummed as she moved her hips around in the seat bottom a little. “I kind of like this. Come here,” she said as she sat up straight and reached for the button on my kakis. Mandy had that “I’m going to suck your balls out through your dick” look as she pulled at the waist band and yanked the zipper down. “This thing is making me so horny,” she said as she pulled my cock out and licked her lips.
Considering that now I got to be a participant rather than just a spectator I did what any other guy would do…I took a step forward and stuffed my cock into my girlfriend’s mouth. Mandy welcomed the mouthful and attacked my cock with a vengeance, taking almost three quarters of my length in her mouth before she began pumping her mouth up and down. “Holy fuck!” I exclaimed as Mandy was really serious about sucking my balls dry.
She pulled her mouth free of my cock and licked her lips once before she said, “I am so fucking horny. This thing spinning around inside me feels so good, I could get used to this.”
It was tough to concentrate on what was going on around me as Mandy sucked my cock, but the sound of rushing water had definitely got louder in just the last few moments. Mandy must have been feeling the effects because her chest began heaving up and down and she rocked her hips forward and backward as she sucked on my shaft. Her free hand came up to her right breast and she began pinching her nipple through the material of her shirt.
“Oh my,” she panted as she once again pulled free from my shaft. “This thing is spinning so fast in my pussy!” Once again she locked onto me with her mouth and began pumping her fist back and forth at a quick but erratic rate.
When Mandy started to whimper I lost it. Grabbing two hands full of her hair I stuffed my cock into her mouth and fired. Mandy let out a stifled groan as her mouth became instantly full. Just as she made the first swallow I froze, hearing the sound of large stones grinding against each other. I twisted my upper body and looked over my shoulder at the wall as Mandy swallowed the second mouth full I had just given her. Again, for just a moment, I heard the sound of big stones grinding together. I looked down at Mandy just as she pulled back from my cock. A long string of cum stretched from the hole in his helmet to her bottom lip as she pulled back.
“I am so close!” she wailed as she ground her crotch back and forth on the spinning key, urgently trying to bring herself to orgasm. “David, I am so close!”
I took a quick look at the wall before I looked down at my girlfriend perched on the edge of a major orgasm. She was almost in agony from being so close to an orgasm yet unable to finish. Then it hit me. “Let me help you with that,” I said as I reached down in between her legs and gave her rock hard clit a good rub with my fingertip.
Instantly Mandy arched her back and screamed at the top of her lungs as a massive orgasm hammered her like a runaway freight train. “OH GOD YES!!!!!” She sat up almost perfectly upright, stiff as a board and almost completely unmoving as the overload locked her in place. Her breath was only a slight flutter and her mouth hung wide open as her orgasm paralyzed her fully planted on the spinning key.
Immediately, from behind me, I heard the sound of stones grinding. I turned around and watched as the stone wall parted in the middle and the two halves folded back out of the way. “Well I’ll be…” I said as I looked at the new pitch black passage in front of us. “So that’s what it’s for.”
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