Coal decided it be best to rearange his postion, and sit on the floor. His knees pointed outwards and his legs spred to accomidate his growing balls. He couldn't seem to get enough of the hot juice that kept seeping from his over sixed monster cock.
On the floor he found that he didn't need to bend over for his spongy head to push into the back of his throat anymore. In fact it seemed to continue to lengthen with each massive volley of spicy demon seed. Coal also felt other strange changes happening to him. He felt the muscles in his neck and throat thickening, and twitching with long massaging motions. His tongue was becoming fuller, stuffing the space his already fat shaft was occupying with even more pressure.
It then dawned on Coal, his body still was physiologicaly human. HUMAN! He's been sucking down demon fluid for nearly an hour now, and his body will most certainly would react to it! Coal began to panic, and made an attempt to yank the swollen cock from his face, but it was now logged in the back of his neck. Coal stood and tried to pull it down, but he could only barely get the head to pop back into his mouth. The force of his previous sucking, and pressure of his new bloated tongue made sure his cock couldn't leave its hot wet home.
In fact, all the stroking and stimulation Coal was doing to attempt to remove his cock, only made it angrier, his balls heavy with juice and now hanging down to his knees, churned and began to send up more cum as if to answer Coals commands.