Stay away, no cards, give no approval. The invitation is a trial run to see how you will react. KAB Knowledge Attitude behavior. Communism uses this KAB. You can use this: Your knowledge tells you the baptism she had, catholic, was correct, and what she is doing now is wrong, against the True God. So, your attitude is, I don't agree with this person. Behavior= I don't attend. If your family member asks, " oh, why can't you come? You answer KAB. Knowledge this baptism is not to remove original sin, and your baptism as a catholic, that is not good enough?! Attitude: I am disappointed in your actions/thoughts, Behavior: Pity you and pray for your conversion. Don't hold back. If the family member asks about your actions, be ready to defend the True Faith of Jesus Christ! This is your chance to speak up and others may just follow your efforts to defend!