I am absolutely capable of saying something like what is under the spoiler without any hint of insecurity. Knowing her, it's very likely her response would be, "What do you mean?"
That is not the response you are attempting to induce.
Misinterpretation with some innuendo while calling her on her BS statement, all while using your humor and not being too serious. Twinkle in your eye.
Closest behavior I can come up with is "Craig Ferguson flirting"...watch some of the Youtube analysis of his behavior.
While working on your personal growth, you can test all kinds of new behaviors. The new behaviors will most likely feel uncomfortable.
"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