Surprised by his father having entered, Jeff accidentally hit a button on the chronivac entitled, "possess nearest subject."
Instantly jeff found himself in his father's muscular hairy body. Reading the 'changes submitted' he understood what had happened.
Looking in his bedroom mirror, jeff saw some serious potential for this transformation. His hunky dad had such a big full figure, and how had he never noticed his ass? Jeff started to pop a boner in Mike's body as he rubbed his body down.
Quickly grabbing a cucumber from the kitchen and a condom from his dad's night stand, jeff excitedly got on his father's bed. And stripped down to his tighty whities, getting a good look in the vanity mirror across from the bed.
Jeff rolled the condom onto the cucumber and began to fuck his father's ass, and then he heard something...
"What's going on... Jeff what did you do to me??"
Jeff knew that it was his father's consciouness that must have been temporarily knocked out before, but was now awake, and realizing that his son is fucking his butt!
"Dad, just let me finish," said Jeff aloud in Mike's masculine voice. Mike continued to protest, though his protesting eventually turned to moaning as jeff opened up his body to feel the pleasure.
"Fuck me, fuck me," said jeff in his father's body, getting pleasure seeing the words come out of his father's mouth. Finally he orgasmed, and jeff was sent back to his own body.