Jeff's dad enters the room and sees his monkey-son on the floor, covered in cum. He didn't know how to react, he didn't even realize it was his son until he lifted his head from the ground and screamed "DAD?!".
His dad notices his new grey-ish and hairy feet, staring at them while a tent forms in his pants.
"Son what happened!??"
"I have no idea! I just woke up like this!" (Jefff was partially lying, not saying anything about how he turned his feet into gorilla feet the other day)
"Ok.. I'm not sure what to do, let's start by getting you cleaned up, you stink! Follow me"
Jeff stood up and followed his dad to the bathroom. His dad filled the tub with water and told his son to get in.
"This is horrible Jeff, what did you turn into?"
"It's not so bad dad, I can now pick up and eat stuff with my feet!"
Jeff stretches and plops his feet out on the edge of the tub, towards his father. He starts wiggling his new monkey toes. His dad starts rubbing his feet, feeling the soft gorilla skin and analyzing their new shape, similar to how a hand looks.
"Yes they are.. different now. I think my human feet are still better though"
"No way, the shape and skin of your feet is so much worse"
His dad takes Jeff's remark as a challenge, quickly undressing himself and putting one of his feet up on the edge of the tub, his sole pointing towards his son.
"See? My shape is so much better"
Jeff immediately grows a full-erection at the sight of his dad's size 14 foot, around the same size as his monkey feet. Sure, he may be human but his dad was such a hairy, thick man, he may as well have been a monkey. Trying to keep his erection hidden, he yells "Eww, it stinks! You need a bath more than me!"
His dad didn't say anything at first, but he noticed his son's erection under the water. He himself was full of hormones, he'd do anything to feel the tip of his dick touch the massive grey monkey feet right in front of him. So he jumps into the bathtub, sitting on the opposite side from his son. He stretches lifts his feet up, pushing them onto his son's shoulders.
"Well, no reason we can't take a bath together! We are family after all. Here, you mind helping me?"
His dad grabs a shampoo bottle and pours some over his son's feet. He then passes the bottle to his son and tells him to do the same on his feet.
"I bet my human feet will clean you up better, haha", he says as he starts rubbing his shampoo-covered feet over his son's body.
Jeff was already leaking so much precum. He couldn't contain his excitement anymore, his body lets out a natural "OOh, OOH, Haa, HAA" as he stretches his feet to his dad's face.
"Yes! YES, monkey-son!" His dad exclaims while lowering one of his feet to massage his son's dick. Jeff also lowers his feet, feeling his dad's erect penis. He couldn't believe he was doing this, giving and receiving a footjob from his own dad, in a bathtub, while they are both covered in shampoo and their natural monkey and hairy-human musk is in the air. Jeff starts chewing on his dad's foot, continuing to scream "ooh, haa, ooh, haa, haa" in a tone only a monkey could make, while the other foot is pressing on his monkey penis and balls. His own feet jerking off his dad at the same time, a perfect bland between a handjob and a footjob.
They both moan in bliss as they finally ejaculate in the warm water. His dad gets out and picks up his son who is still mid-orgasm. He carries him to his bedroom, putting him down on the king-sized bed. He starts licking his son's hairy, grey, monkey feet, feeling extreme pleasure.
He lays down in bed, massaging his son's still erect cock with his foot, while still licking the monkey feet. He already grows erect again and can't wait to test all the new things his son's monkey feet and body can do in bed.