What is the meaning of "She is right about that!" in the following sentence (Source: PHONICS PC COMICS Volume 3 Issue 1),
Mom stomps downstairs to the kitchen.
Quick, Zak! Where are the GROW buttons on our super shrinker belts?
I cannot find them, Zane! Shhh! Mom is coming back! Oooo!
This is gross!
She is right about that!