If the answer is no, then the next time she brings it up:
W:"It's after Christmas, when do you want to tell the children?" H:"I do not want to tell the children, but this D is your choice and I will support your decision. I believe we should tell them after you found a place to live." W:"You keep pushing this out bla bla bla" in a frustrated tone H:"The sooner you move out, the sooner we can tell them" W"bla bla bla" in an angry tone. H:"You sound angry." Then keep validate her emotional state.
(I self edited part of that. Use it or not, the less words you speak, the better)
"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