"for better, for worse" eh ?
You sound like the sort of woman I'm glad I've never known.
How about confronting your husband ? Tell him everything you said here. See how he handles all that. It sounds to me like you have drawn a line through your marriage a long time ago & the escorting thing is a convenient reason to end it all, take it all & shame him.
You once must have loved him & now you obviously hate him. Do you hate him enough to really do all that to him ?
Maybe you should look at why you think he started seeing escorts ? In my experience no marriage ends with 100% of the blame on anyones shoulders.
Your black & white logic is scary. Have a good look inwardly & ask yourself how you have contributed to your marriage being where it is.
"I don't want to go to heaven. None of my friends are there."
Oscar Wilde