Bess and Melody started pottytraining on the same day. Purely coincidental.
One took about 10 days to fully train. She went from diapers full-time to panties 24/7. No nighttime accidents.
The other waits until mom leaves the room to remove panties, put on sister’s diaper, pee in the diaper, remove the diaper, toss it into the trash can, and put panties back on.
You’ll never guess which one is which…