If one of your siblings was getting married to a non believer would you attend the ceremony? I absolutely would go to the man's bachelor party, to keep him from dishonoring my sister the night before their wedding. And I can see myself getting more involved in my sister's life afterwards, because she will need support and love all the more. My question isn't whether I would drop out of her life. Certainly not, just the opposite. I can't support the union, because he can't love her as Christ loves the Church, because he doesn't love Christ. Her father is going to have to continue doing that for him. Her Father is still her covenant head in many bregards. My Question is; would i attend the ceremony (coming from the middle latin awed, or revered rite) between a believer and a nonbeliever?