Do you know of any support groups for the spouse of someone who belongs to the Society of St. Pius V, a nominally-Catholic group that believes that there is no current pope (sedevacantism)? Life in our house can be very difficult at times and I am sure other strong Roman Catholic spouses would like to share in their struggles and what they did or doing to help the loved one to return to the fold. Any words of wisdom are greatly appreciated.
I am unaware of any such group but I recommend getting a referral to a Catholic marriage counselor from either the Pastoral Solutions Institute or from CatholicTherapists.com. If your spouse will not go, go yourself. Hopefully the counselor can help you develop coping mechanisms.