Pretty much Megan

This is a conversation that took place at work. I laughed about this one for a while.

One of my female part timers told one of my students to not do something and he didn't really agree with it.

Student 1: "Megan, he is stoppening!"

Student 2: "No, it's SHE is stoppening!"

Correct pronoun, but what the heck does stoppening mean? I love these kids.