Married 12 yr but still not part of his family

I am 61, my husband is 68, we have been married for 12 years. I am his 4th wife and have been with his longer than the last 3.My problem is that his family won't except me. at his son wedding I was not allowed to be in the photo's because I am not immediate family because we have had no children together but his other son wife were allowed in the photo's and they have had no children together. I always thought that his family liked me and we all got along find till then, it hurt my feeling but I have been dealing with it. Now my husband has been invited to a family reunion and he told me that he would like to go but not asking me to go along. I am so hurt, no one in his family have ever had a cross word with me but no one has called since then to talk to me. I have called several times and questioned my husband but have gotten no repay. think maybe he is taking someone else, should I just show up there anyway. I love him but I don't want to be left in the blind, just be honest to me , I can live with that and go on with my life but I can not live with this, but what if I am wrong and he just wants to see his family without me.(divorce??)help please!!!!

Have you asked him if he's going to the reunion with another woman? Or seeing another woman. I would tell him that you just wanna know the truth. Especially, if everyone at the reunion would know before you did. Also, try not to take the wedding picture too personally. It probably has more to do with their dad's track record for long lasting marriages, than with not liking you.