Emily saw a button that said "Freeze time except for subject". Emily figured the subject was her original Mommy, so she pressed it.
"AND I'LL HAVE YOU KNOW--!" yelled Diane 1, arguing with her doppelganger as she relized the time stop. "Wha-what's going on, Emily?!" she said, panicked. She looked at her daughter with a thing in her hand that looked like a cheap video game. "I stopped time" said her offspring, matter-of-factly. Diane was silent for a few moments. It didn't last. "How were you able to stop time?! More importantly, WHO IS THIS?!" she said, releasing her questions, somewhat weirded-out that the answers were going to come from her 10-year-old daughter. "I got this thing from Jeff. It can do anything!" Diane was puzzled. "Then wh-where is Jeff?" she stuttered. "Right there," said Emily, still looking at the screen, pointing to the other Diane with an angry look on her face from the argument. "What?!" shouted Diane, looking at the imitator for any signs of her son.
After not being able to find one, she turned to her daughter with a queer eye. "Now what are you doing?" she asked, almost TOO calmly. "I'm making Jeff--er--YOU pregnant with you", her daughter responded. Diane's puzzled look returned. "Wh-WHAT?!?!" she said, finally. "Yep," said Emily, still messing with the Chronivac. Diane looked as furious as her son-turned-clone. "EMILY IF YOU DO THAT, YOU'RE GROUNDED, MISSY!"
Emily finally looked up from the Chronivac, but was non-plussed. "You won't be able to do that, Mom--uh--Ma'am". "AND WHY NOT?!" her mother asked, fists shaking at her side. "'Cause in about 5 seconds, A)I'll be older, and B) You won't remember it..."
Emily pressed the "Begin Transformation" button. "What are you talking abou--" began Diane, before she felt herself shrink a few inches. Her work suit begain to feel baggy as shrunk and got smaller. She was already fast through High School at this point going back to 8th grade. She noticed her prized large breasts and perfect ass get smaller, getting flatter. Her chest was barely a B-cup and her ass was barely plump as she re-entered the 6th grade. Her freckles she had as a kid had already returned and her legs went from luxurious to skinny and thin, same with her arms. Her skirt and panties fell down and her already shaved pussy was now bare and childish. She was at about 12-year-old when her shirt just fell off, leaving her naked except for her heels and her too-big bra.
She soon went to her daughters age when she fell out of her heels and landed butt-first on the ground, picking herself back up as she went to age eight. Her baby fat returned, and Emily noticed her mother wasn't always a knockout. After attempting to plead with her now-older daughter, she went into Kindergarten. Finally entering Pre-K, she just broke down crying. She continued well into her toddler and baby rewound life. When she got incredibly small, she noticed her daughter pulling her brother-turned-other-mother's skirt and panties down, revealing her snatch.
A long flesh-rope came out of Diane 2's vagina and proceeded to latch on to the original's belly button, becoming the umbilical chord. Diane cried and moved a little as she was forcibly sucked in to her double's womb. A belly almost immediately appeared on the other Diane, containing the first one as an almost-done fetus. Multiple buttons popped and Emily heard some fabric rip. Emily took the Chronivac and went to "Clothing options", changing her new mommy's clothes to a large tank top that fits the baby bump and pregnancy pants. She also changed her mother's expression to calmness as she wanted her sister soon.
Emily pressed the "Time Resume" button and Diane felt her unborn daughter kick and let out a groan. "HONEY!" she said in pain, "Call your father! The baby's here!"