get what's coming to one
Receive what one deserves or is due, especially something unpleasant, such as a punishment or rebuke. For example, When they suspended Steve for cheating, he was only getting what was coming to him.
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.