Seeing his manly father reduced to a mere 11inch doll sized person gave Jeff a hard on. Jeff decided to make one last change to his father before having some fun with him. Using the specific mental change function on the chronivac, jeff made it so that his Mike would obey any command given to him by Jeff only.
"Dad, we're gonna have some father son bonding. Don't fight it." The last sentence was interpreted as a command and Mike found he couldn't run away or protest as Jeff approaced him and grabbed ahold of his doll sized muscular hairy body. Jeff was wearing white briefs, which ironically his father had bought for him, and he put his father's naked body inside those briefs, against his 5inch teenage boner.