The more you try to fix your marriage, the more you are going to break it.
What you fear, you will bring to reality. You fear losing her and the M. Do not let fear control you.
As a man reading your post from your POV of what went down, I was rolling my eyes. Nothing attractive or exciting. Supplicating, manipulative, and needy. Stop using sex as a measuring stick.
Was she pursuing you or were you pursing her? Which of these two options sounds like what you want in a relationship.
Embrace every aspect of the DBing principals.
You have to drop the rope. She needs to feel like she has lost you before you have any chance. Put your needs on hold. Give her what she needs.
List out everything that SHE NEEDS. Then list out how you can behave to meet those needs.
This will be one of the hardest things you will ever do. Do it strength and honor.
We are on your side.
"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