The demon cum that coated Dustin started to soak into the teen's skin, causing the corruption to begin as his skin turns into a bright shade of red. "M-MOOORREE!!" Dustin's screams out, his father pulling out of the boy in shock and awe as he watches his son transform into a demon.
His muscles became more tone, feet and hands turning into powerful sharp claws as two long horns grow from his forehead. Dustin's cock throbs and grows a foot long and 3 inches thick, his ball-sack growing into the size of grapefruits. "AHAHAHAHA!!! YEESSS!!" His transformation was almost complete once his mind became fully corrupted, six tentacles shoot out from his back in a quick and pleasurable action. Mark laid back on the other side of the couch, furiously masturbating at his son's transformation into demonhood.
"Ooohhh Dustin..you look so good son!!" Mark moans as he starts to cum, shooting tiny strings of sperm all over his chest.
"A-Aaahhh!" Dustin roars out as he shoots his thick seed all over the wall, beginning his new life as a corrupted demon. "Thank you so much for giving me this body, Ty! F-Fuck I need to fuck something!" One of Dustin's back-tentacles slides its way and enters inside his asshole, turning around to put his attention on Mark now. "I'm going to fuck you, father. Your soul is mine now!"
"Yes! Please fuck me! Fuck your daddy, Dustin!" Mark spreads his legs out and strokes himself again, his cock getting hard rather quickly for someone who just came a minute ago. The demon grabs Mark and shoves the first few inches of his monster cock inside the man's tight asshole. "YEEEEEESSSS!!!! FUCK ME FUCK ME FUCK MEEEEEE!!" Mark lost control of all his thoughts, his mind finally being broken into a corrupt state of bliss. Dustin only thrusts his shaft in halfway in and out, being very loud with his own vocals.
"A-AAAAAAHAHAHAAA!! YEESSS FEEL ME FUCK YOUR ASS, FATHER!" Dustin laughs out in a very evil tone, the deepest darkest thought of fucking his father finally coming to light and taking over the demon's mind. "FEEL THE CORRUPTION! LET IT SEEP INTO YOUR BODY!!"
Ty strokes himself and groans, watching the new demon son fuck his still human father. He ponders to himself if he should escalate the situation even further..