My future father in law just informed my fiance that if we do not invite the father in laws sister to the wedding, that we should not invite him as well. I have been with my fiance for 13 years and I have never met this woman, EVER. Why would I invite her?!?! It is so childish, selfish and hurtful. Those words can never be taken back. What am I to say the next time we meet? What suportive words can I share with my fiance other than we will still invite him and let him choose?