How can I get my wife to stop swearing when talking to the kids?

I’ve asked nicely.. now I’m out of ideas. Sometimes it’s borderline abusive how she yells. She’s blaming her “potty mouth” on our recent marital problems… which.. I can understand anger and frustration with me.. but.. the kids haven’t done anything outrageous.. Sure, they disobey from time to time but they are just young kids…