"Teach you a lesson."
Jess is too nervous to ask what that means as she's briefly handed off to a waiter. The boy is about her real age and clearly unenthused to be randomly gifted a toddler.
A few minutes later, mom returns with a diaper bag. She reclaims Jess and sticks a pacifier in her mouth.
"Great news. You're not going to be stuck at this wedding any longer. You obviously aren't a big enough girl to handle it, so I hired a babysitter. Don't worry I made sure to pick someone you'll really like."
Jess ponders this, she already appeared as a baby in front of her entire extended family. Who could mom think she would be embarrassed to be babysat by?