Jeff programmed it so they would both become 2, essentially making them toddlers. He then set reality to change so that they would stay in his house over the weekend with his parents thinking that Jenny was having a sleepover with him. That was also the time limit he set for the duration of the regression which would end at midnight on Sunday, essentially giving them 48 hours as babies. Hopefully that would be long enough for his girlfriend to get this weird desire of hers to be one out of her system.
"Okay I think I got everything and the timer is set for 30 seconds" he explained to Jenny.
"Can I look it over real fast?" she asked him.
"Sure, be my guest" Jeff replied as he stepped away from the computer to let her see.
Jenny scanned over the changes, nodding her head in approval before typing away at the keyboard.
"Hey what are doing there?" he asked trying to peek over her shoulder.
"Just making some minor adjustments."
"You better not be making the time limit longer, two days is quite enough" Jeff warned.
"Oh don't worry I'm not messing with that" Jenny promised.
"I worry plenty when you decided we should go back to being babies again" he griped with crossed arms.
"Aww don't be such a party pooper" Jenny said as she hit the enter button and started the timer.
"In a half a minute I'm gonna be a pants pooper" Jeff admitted with a groan.
"Trust me you gonna love being a toddler" Jenny grinned.
30 seconds soon passed at which point their bodies started changing, becoming younger at a fairly rapid pace. Jeff watched as he and his girlfriend shrunk in height due to the de-aging, going backward through puberty and into early childhood. Their clothes with the exception of their shirts and underwear disappeared, with those two articles of clothing shifting to match their new dwindling ages.
"I certainly don't remember programming this to happen. This must be something Jenny did" Jeff thought to himself, relieved that she didn't make a more drastic change.
His relief didn't last long as he noticed the childish pair of briefs he was wearing start to morph into something else. Frowning he witness the cotton fabric become more plastic like as it turned into a pair of Pull-ups. Sadly the transformation didn't end there as the training pants became thicker and more absorbent, puffing up and growing whiter before finally giving birth to a Pampers cruiser disposable diaper.
While Jeff was visibly saddened by the downgrade to lowest form of underwear, Jenny was happy and excitedly poking at and prodding her padding with her little fingers. Looking at his girlfriend and a quick glance at himself showed that their regression was finished, both of them being exactly two years of age. Checking his room he saw it had changed into something more befitting of a young toddler than a teenage, with a colorful wallpaper, a crib, changing table, toy chest...the whole nine yards.
"So whaddya think Jeff?" Jenny asked in her new younger high pitched voice.
"I think we look ridiculous" Jeff admitted with a pout.
"Don't be like that. Anyway you gotta admit that program is incredibly amazing, it really made us babies again. Look I got my baby teeth back, well most of them any way." To prove her point Jenny opened her mouth to show off her underdeveloped teeth, along with a few gaps that still needed to be filled in.
"And check it out my boobs are gone!"
Lifting up her shirt Jeff saw she was indeed correct as both mounds had vanished leaving her completely flat chested.
"Yeah...great."
Not hearing the sarcasm in his tone or choosing to ignore it Jenny continued on, "I know right? I bet my vagina is different now too!"
The baby girl then pulled back the front of her diaper to look at her privates. This action made Jeff feel curious and prompted him to do the same. Peeking inside his own Pamper he saw his penis had shrunk even more than his body. Now it was nothing more than a nub with his balls underdeveloped and being only slightly bigger than marbles. Taking the loss of his manhood in stride Jeff let the waistband of the diaper snap back into place. It was then that he took a better look at his padding and noticed the designs adorning the outside. Typical standard baby fare with image of dinosaurs and abc lettering. Looking at Jenny's he saw that hers were different in that she had animals.
Speaking of his baby girlfriend her short toddler attention span had shifted once again as she started getting excited over...