I worked in a question about something kinda casual that I knew as a test and she didn't skip a beat to deceive me. ...putting up with this at all is just a lack of self respect
It all depends on how big the deception is.
Cheating, OM etc, I would call her on the BS.
"We both know that is not true. When you are ready to tell me the truth I will listen" then walk away.
or "The Deceptions has got to stop."
Other things might require different response. When In doubt, do not respond.
"What is best for my kids is best for me" Amor Fati Link to quotes: https://www.divorcebusting.com/forums/ubbthreads.php?ubb=showflat&Number=2879712