When your job gets reversed. When your shit gets all messed up just the way you messed up someone else's shit.
The concept comes from a fortune bubble gum wrapper that reads "Man who live in glass house should not throw stone."
This concept is often ignored when people do things for someone else.
She's suffering from glass house effect.
She cast the first stone and just kept throwing, then one of 'em hit her glass house and, well, you can imagine.
I heard she did it herself.