I told my kids years ago.
This might be your Ma,,but she’s my wife..
you take it from there.
Not long ago my granddaughter was mouthing off to her mom. Normally I stay clear of disagreements but this was getting fast out of hand...I finally spoke up and told my granddaughter...you may talk to your mother like that but you will not talk to my daughter-in-law like that in my presence. She got it! Backed down.