I strongly suggest reaching into her purse and talking your balls back.
W:"Lets talk about nesting!" H:"Nothing to talk about. I decided, I will not be nesting. I also will not be moving out, I like it here." Do not show your emotions.
She will respond. Validate her feelings.
At some point, this is all about negotiations. She wants out, not you. She is free to move out. Do not attempt to control this. Set her free.
If you have confirmation that she is engaged in a secrete affair with OM, then I would be strongly encouraging her to find her own place ASAP.
"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