She meets with her "sitter."

It was Friday. Marinette loved Fridays. Sure, all students loved Fridays, but Marinette extra-loved them. Why? Because she could be a baby to the fullest.

She could act like a baby whenever she liked (or at least when no one was around), but babies needed love and attention and affection. Someone to feed them as read to them and change their diapers.

The number of people that knew about this side of Marinette could be counted on one hand, and on Fridays, they volunteered to take care of her.