The boundary around a A needs to be firm and non-negotiable.
"I have decided I won't share my husband with another woman. If you don't immediately cease all contact then I will pack up your things and initiate a divorce."
If he agrees then you have your transparency plan ready - a no-contact letter sent to her which you witness and have access to all forms of communication and financial records.
M22,H45,W45 S21/18D12 Retain faith that you will prevail in the end, regardless of the difficulties and at the same time confront the most brutal facts of your current reality, whatever they might be.
