As she was looking over the pocket watch, that she assumed her curious toddler daughter must have swiped from someone during their long outing, Lisa's mother happened to notice all the strange buttons and settings. Clicking the "self" button the watch then displayed "40 years, 4 months, and 10 days" which was her current age given she gave birth to Lisa a few months after turning 38. She was just about to try something else when Lisa started tugging at her pant leg. "Not now honey, mommy's busy with something." Lisa knew her mother was going to discover the watch's secret if she didn't do something to distract her, so she proceeded to tug harder and let out a whimper.
Letting out a sigh her mom ignored the watch to kneel down in front her precious baby girl, "What is it sweetie? Do you need to be changed?" Before Lisa could stop her she reached under her dress to feel her diaper, a knowing grin appearing on her face. "Oh, so that's it isn't it? You're all soggy and you want to be changed" she chuckled, "Well don't worry mommy will change your diaper as soon as she figures out what's up with this kooky watch." Her mother then stood back up to examine the watch. "This button looks like it starts it" she said fingering the start button. Lisa the watched in worry as she pushed it. "Please don't notice it's making younger" she prayed inside her mind. Her mom then noticed the watch's hands start to spin backward instead of forward, and at a speed of going back a full day for every 5 seconds. Checking the display that showed her age she saw it now read "40 years, 4 months and 5 days."
"That's cute, it's making it seem like I'm aging backwards. Though I wonder, is it possible it's doing it for real?" she thought to herself. Determined to know for she spied the speed button which was set to low. If the watch really was regressing at this speed the physically changes, if any, would be too small to notice. So she turned up the speed so she'd be losing roughly 5 months a second. As soon as she made the change Lisa's mother got her answer as she noticed her body begin to youthen rapidly, and her clothes for some reason apparently changed with her.
"Holy cow. I'm becoming younger for real. This is incredible!" she said in disbelief. Rather then stopping the regression she allowed it to continue. Meanwhile Lisa could do nothing at the moment except watch her mom age downward, only stopping once she became...