Jeff, already having the time of his life, quickly runs to the bathroom, careful not to run into his sister.
Sitting on the toilet, he lets his huge cock unfurl, reaching straight up out of his lap and swaying back and forth like a charmed snake. Wondering what to do with it, he scratches himself absentmindedly... on the rear?
Should he... Could he?
Curling his python downwards, he slowly and fearfully bends the shaft underneath himself. It'd reach in there alright...
His long member thobs antagonizingly, a pulse traveling down the shaft. Jeff can't get over how aroused he is, the buildup itself is already ten times stronger than any orgasm he's had before. Suddenly, he feels something!
In his ecstacy, Jeff has been absentmindedly pushing his cock into his own ass. There's pre dripping out his crack, and his cockhead has practically reached penetration.
With a determined wiggle, he drives it in. Gripping the toilet seat, he thrusts the squirming snake in and out of himself, without even moving his pelvis--in fact, his pelvis is pushed forward by the penetration itself. Beginning to moan, feeling immense pleasure in two different places, he white-knuckles the seat and doubles his speed. Finally, a great ripple flowing down his dick and back into his own ass, he cums. Flying out, and leaving a good deal of cream inside, the three-foot limb continues its orgasm, flailing like a fire hose. In his release, Jeff falls to the ground, nearly fainting.
What an experience! Catching his breath, body still, Jeff lies on the floor.