Note: This story contains incest.
Just then, a large table-like slab appeared behind Uncle Dean. The gray alien nudged the man, who took the cue and lay back onto this new, raised surface. His cock drooled strands of gooey precum as he settled into position.
Alan, in disbelief, allowed himself to be maneuvered over to his uncle. Without much effort, he found himself kneeling on the slab next to Dean. This was the closest Alan had ever been to his undressed Uncle. Certainly the closest he had ever been to Uncle Dean's enormous, stiff cock, or any man's for that matter.
Alan looked at his uncle's blank expression. Dean stared off into the nothingness above. Alan placed a hand on his shoulder and shook, calling out, "Dean!" But nothing. The only outcome from shaking his uncle was the man's rigid pole wavering around stiffly.
With this test failed, Alan relented, returning to the task at hand. Comprehending the aliens' desires, Alan shifted, planting a foot on either side of his uncle's body, facing away. He squatted down, his heart racing. Was he really just going to give in? Was he going to sit on his uncle's fat cock as these creatures watched?
He didn't see that he had much choice. And deep down, whether he wanted to admit it or not, Alan felt the desire inside himself. After the alien dildo had been removed, his hole felt empty. He longed to fill it, even if it was his own uncle doing the filling.
He lowered himself, but stopped suddenly when he felt the hot, stiff flesh rod poke his bare butt. He wanted it, but he was afraid. Afraid of the immediate circumstances: How could he possibly fit that big thing inside him? Wouldn't it hurt like hell? And afraid of the future: We're these aliens ever going to let them go? Were they doomed to play out perverse sexual fantasies forever? Were their lives in danger? And even if they were released, how could things ever go back to normal after this? Alan now felt desires for his uncle, for his strong manly body and for his insane man-dick. Would Uncle Dean remember any of this? How could they learn to exist with each other with these corrupting events?
A long-fingered hand maneuvered between their bodies, taking hold of Uncle Dean's stiff pole. The thing slipped between Alan's cheeks, and he drooling cock knob pressed at his exposed winker. No more time for wondering, Alan thought, as his uncle's cock prepared for entry.
Uncle Dean's hands moved up to grip Alan's bony hips, pulling downward. An icicle stabbed through him as the fat cock head pressed tightly to his teen bud. He felt Uncle Dean lifting himself from the slab, pushing his cock upward.
The presence of the alien desires inside his mind intensified. These aliens wanted Alan to get his ass fucked by his uncle. The teen concentrated, letting his hole relax. And then, he clamped down tighter than ever as Uncle Dean's knob pried the boy's tight ring open.
Alan was shaking, breathing heavily. His eyes were squeezed shut as all of his mental energy focused on the thing that had entered his body. His hole burned from the strain of accommodating the large mass.
But it was just the tip. There was still so much to go. Again, with greater effort, Alan willed himself to relax. He unclenched, letting Uncle Dean's bulb find its home up inside his hole, past his quivering anal ring.
It had really begun. Alan dreaded the thought of the long journey ahead. He forced himself to squat lower, so extremely slowly. His tight circle of muscle began to expand as his uncle's thick tube pressed into him. It burned, but Alan kept breathing and lowering himself. He was taking his own uncle's fat cock inside his asshole.
Uncle Dean again lifted himself, bringing his butt up from the smooth surface to press his stiff thickness into his nephew's tight warmth.
