"Clean!" You growl at the lumberjack and shove your shit-covered foot straight in his face. He obeys instantly and starts eagerly lapping up all the dung from your soles. His body reacts to your corruptive excrement just as quickly. His eyebrows connect, beard grows thicker and moves further up his cheeks while all the hair on his exposed arms turns into black, bigfoot fur. Once your feet are clean, his attention shifts towards the massive pile of dung you've produced with your dad, you can see the conflict on lumberjack's devolved face. He wants to obey and wait for your next order, but the hunger for shit and the need to complete his transformation are simply too strong. He crawls up to it and gorges on the steaming pile while another one begins forming behind him as his furry, beastman ass pushes out one large turd after another.
You feel tempted to give them a taste but a sudden, thundering fart makes you turn around. It's your bigfoot dad standing bent over with his shit-caked ass directed straight at the father and son lured here by the smell of your farts. The pair is instantly enveloped by the nasty cloud of gas and showered with countless, tiny flakes of crap sent flying alongside it. The father who is standing the closest to your dad's asscrack dives right into it and begins munching at the fat yeti's shitstained fur. A massive bigfoot dick tears through his khaki pants spraying yellow, corrupted cum everywhere when your dad farts again directly into the father's open mouth. Making his transformation advance this much faster as he grows even fatter and his clothes start to ripping apart with grey, bigfoot fur visible through the holes.
Meanwhile his preppy looking, college aged son appears to be coming out of the lustful daze your fart left him in as the air clears up slightly "D-dad? W-what are you doing?" he moans while trying to figure out what is going on.