My wife’s brother (herafter referred to as BIL) has suddenly asked his Protestant wife for a divorce after having engaged in an affair. He continues that affair. They have two adult children, both not practicing. Daughter is trying to maintain a relationship with him, son is actively cutting contact off. He had a daughter who has not yet been seen by BIL. All over the past three months or so.
My wife and I are faithful Catholics. She has 5 sisters, two of whom are Catholic, though they don’t practice regularly.
BIL continues to reach out to his six sisters and others, including in-laws. He updates us with his current situation via email and wishes to belong to our facebook networks, for example. His updates include things like his personal career stuff as well as family news such as the birth of his new grandchild. One disturbing incident was when he invited my wife and me to attend Mass with him and his mistress. We declined, citing an explicit desire to not meet the mistress. This was the second time we voiced these concerns, yet BIL persisted.
I feel my wife and I should also end communication with him until he comes around, however feel also that he needs to have the truth in front of him. To my knowledge, no one has confronted him directly from a Catholic point of view. Actually, the main reason for posting here is to determine if I and or my wife have any obligations in this manner as far as the Church is concerned.
Thanks for anyone’s input!