As Jess was waiting for the up date to finish so she could turn herself back into the boy she know she was she spent her time doing a bit of a clean up down stairs.
Unknown to Jess was that Mason had gotten some of his memories back while he had been playing with Mandy and he remembered that he was a 16 year old not this kid. So Mason made an excuse to Mandy about needing to go to the bathroom but instead went to Jess's room where he remembered the Chronivac was.
Unfortunate for Jess but fortunate for Mason the computer had finished doing its up date when he got to it so he had no problem logging back onto the Chronivac program.
The first thing Mason did was to turn himself back into a 16 year old, then he made some changes to Mandy so she would not notice that she no longer had a friend over to play with. Mason then remembered the talking he had heard about Jess's parents going out for the night.
The next think Mason thought of was what might have happened that had made it so he had been turned into a little kid. The first thing that came to mind was that Jess had done it for some reason that he could not think of but he had a way around that.
Mason called up Jess's stats and made it so she now thought she was Mason's girl friend and that she had called him over to make out while her parents were out.
Mason did not want to be disturbed while he was making out with Jess so he change things so Jess's parents had not ordered a babysitter bu instead were trusting Jess with things for the night.