Evolution is not Maturation

Braixen was getting way ahead of herself. She’d evolved from Fennekin a few days ago and felt like she no longer had to listen to her mother, a Delphox. She’d stopped doing her chores around the house and generally speaking to her mother. This didn't sit right with Delphox, not one bit she’d missed her Fennekin and didn’t want her daughter to drift away from her any more than she had already. She waited till Braixen fell asleep for the day, passed out from acting rambunctious all day. She used Psychic to invade and change her daughter’s thoughts. She wanted her back to being a dependent on her.
"Anytime you back-talk your mother you will need to use the bathroom"
"You will accept when your mother puts you into diapers and won’t try to take them off."
“Anytime you use your diaper you will become more and more babyish”
With these suggestions in place Delphox slipped out of her daughters door to wait for the morning.
Braixen awoke early with a spring in her step, she felt good almost like she was younger.
On her vanity sat a thick disposable diaper with a note “please wear -mom” without a second thought she opened the thick garment laying it on the floor . The newly minted adult lowered her rear into the diaper pulling the tapes tight and adjusted the leg holes. She stood and waddled out of her room without a second thought not even registering that she wore a giant diaper like a giant baby.
Walking into the kitchen her mood slipped a little seeing her mother, what kinda crap was she going to ask Braixen to do. Delphox didn’t disappoint.
“Good morning honey would you help me make breakfast?”
Braixen glowered “Jeez mom, i just woke up can you give me a second.”
Psssssshhhhh
Once the sentence left her mouth warmth spread through the front of her nappy it sagged a little with the added liquid.
“W-What just Happened?”
“It seems like my hypnosis is kicking in sweetheart. You’ve been growing up far to fast for my taste and just because you evolved doesn't mean you’re at all a grown up. Any time you back-talk me or disobey me you’ll end up using your diaper, every time you use your diaper your mind will slip away like a baby more and more. If you go back far enough sweetheart I'll just re raise you from scratch!” Braixen stomped her feet and huffed “you Can’t do this Mom!” her stomach grumbled at that statement but it didn’t slow down her rage. “I’m not a Fennekin anymore and I’m not your baby, I'm a big girl and I Hate you!” That pushed her over the edge and the pain in Braxien’s midsection caused her to double over. With knees bent her body pushed on its own.
BLLLLLORRRRTTTTT!!!!!!
Pssssshhhhhhh
The back of her diaper expanded out to accommodate the huge log of solid mess she forced out. Another rush of urine stained the front of her padding yellow. Braixen’s last adult thought was her worry about reaching the bathroom before it all slipped away and her first babyish though was: “Squishy!”