My Earliest Memory

What if Marinette was an older version of Boo from Monsters Inc.? one day Marinette and her friends are sharing their earliest memories Marinette tells of this creature that came into her room one night and that she called it kitty. What if one night Marinette was accidentally scratched and became a monster herself? how would her friends react? I do not own Miraculous Ladybug or Monsters Inc. all rights to the original owners