My fiance's parents JUST got divorced and his father's girlfriend (who was the mistress that destroyed their family) is assuming that she has an invite to the wedding. I feel like it would be extremely disrespectful to my fiance's mother to have the woman her husband was cheating on her with at our wedding. No one likes her other than my fiance's Dad. Would it be wrong to request that she not come. How would explain it to his father that he should come alone?? I need help!