"But...but...Mast...er Mistress, don't you want to, reconsider, not that I humble Xanadar would be one to complain given the circumsatnces...but Coal, rather uh...you..would probably..." Xan was a little frantic now. He was undyingly loyal to Coal, and understood his Masters desire to retain his humanity, but his loins could not resist the lucious beauty about to scewer herself on the growing Imp's fuck pole.
"Silence!" Screamed Coal seing the demons cock bulge and gorge itself with blood. It rose a mystifying 8" from Xan's pelvis now, though the little demons growth was only just reaching the 4' tall mark. "This will do achingly..."
"Coal propped herself up on the table that Xan was laying spred eagle, her round prodigeous breast bounced and swayed causing the drooling Xan to ebb more cum from his expanding dick. Xan didn't even notice that his nuts seemed to churn and swell faster every time he had an orgasm suplying a neverending flood of demon cum.
"My little fuck toy, With the amount of demon juice i'll be able to milk from those bulging balls of yours, I'll be able to much more than transform myself back into that pathetic mortal boy..." Coal swung a lucious leg over Xan now straddling him. Xan could feel her heat and sense her pussy close to the tip of his cock.
"What...oooh...what oh, mighty omnipotent mistress...do you intend...ahh, yes,yes...to do?" Xan lurched in pleasure as Coals taught smooth skin brushed up against Xan causing a nother torent of cum to realease and coat the helpless demons cock.
Coal gripped the spasming dick in her smooth clawed hand and guided it to her dripping pussy. She wasn't at all shy about shoving the flesh rod all the way into the hilt, pressing her wide muscular ass firmly onto Xans pelvis and causing another orgasm to grip his body.
"I realize I no longer have to summon a greater demon to gain the ultimate power I seek, I can simply become one You will supply me with endless power as your balls continue to grow, and cause me immense pleasure as you cock swells fatter inside me." Coal beamed a sharp toothy smile at the little demon while reaching up and twisting her dark delicious nipples.
"Works for me!" Xan resided, and put his hands behind his head and let the transformed Coal fill herself to bursting. And as the thought entered his head he came again to the slow gyrations of his mistress.