You stand for the marriage. You stand on your beliefs. "in good times and in bad".
This is the bad times.
I would suggest you ALWAYS sleep in the master bedroom during this phase of the relationship. I do not like the term "Kick her out". Give her the freedom to sleep wherever she wants.
"I like it here. I prefer if you sleep with me, but you are free to sleep wherever you want"
You should project to her that you have had an awaking. Not a needy one, but that you want her in your life, but do not need her.
Do not reveal what you. Do not reveal how you know. BUT DO reveal that you DO KNOW:
"We both know that is not true" "I will not be lied to" "If you tell me the truth, I will listen"
"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