Jeff remembered her sister was probably going to do something and thought of a fun change. Transformee: Megan, Change: set age to 1 month for a minute, Condition: Tries to use my computer, times?: Infinite. Then hit enter, and realized he should probably do something similar for his parents. He typed in Transformee: Gloria and Steven, Change: forget about chronivac changes, Condition: a Chronivac change reverts. That way they could react to changes, but when they revert Jeff would get away scott free.
Megan barged in and said "Ok Jeff i'll find out what your doing." then the 13 year old ran towards the computer and went to the keyboard and then the Chronivac popped into action. Megan's legs shortened underneath her as the girl tripped, her torso shortened as what breasts existed on her chest shrank back inwards. All her maturity was wiped as a month old baby took her place. The baby wasn't sure what was going on or could really comprehend what happened. She cried a bit, and their mother hearing came in and saw Jeff and a little baby in a pile of her daughter's clothing.
Gloria asked "What happened?" Jeff counted a few more seconds and then Megan the baby started to grow back up. Her legs stretching back into her pants, her arms and head stretching through her shirt's proper holes, and her training bra breasts pushing back into their training bras. Leaving a barely teenager belly down on the floor.
Megan said "Jeff's computer thingy turned me into a baby just now! Didn't you see me on the ground as a baby?"
Gloria had a blank expression for a second and then said "ugh... I did see you on the ground but you haven't been a baby for a decade..."
Megan confused went "But I shrank down into a baby, bawled out of fear, and then grew several years older right in front of your eyes!"
Gloria trying to make things right went "You kind have been quite the big baby recently, and I remember you yelling for me to come in here... However you need to calm down. I hear you yell about Jeff doing something for awhile and your just grounded." Then their mother walked out of the room leaving Megan and Jeff in the room. Megan just questioning what was happening, and Jeff enjoying how well the changes were working. Next...