For a moment Marcus stood frozen, the conflicting emotions of excitement and fear of what was happening both struggling within him to dictate his next action. His growing demonic sight enabled him to see that Brad was starting to change, although very slowly as Marcus' cum was only partially tainted, but nevertheless before the night was through another incubus would be born.
A sound from the stairwell outside broke Marcus out of his trance. His heightened sense of smell told him that it was a woman and a second sniff of the air informed him that her scent could also be found on Brad. Marcus quickly bolted from the apartment before he could be seen, telling himself that it was for fear of being caught when really he knew that Brad would spread the corruption to his girlfriend and together they would endure a slow and agonizing transformation, tortured as their love for eachother is replaced by indescriminate carnal lust, despairing as their morals are torn asunder by depravity and then finally, elation as their blackened souls devour their remaining humanity. The demon inside Marcus smiled.