Am I Wrong?

So I totally got into a cat fight with one of Michael's friends yesterday. Which brings me to ask this...Was I wrong?

Sunday I went to the cemetery with my family, it was tough. 12 years of putting flowers on your father's grave gets to you after a while. We always go to Michael's brother's house for Super Bowl but I just was not feeling it so I went on home. Later that night I was checking out facebook and there popped up a picture of my husband and his friend's wife. No big deal. They have been friends since high school, she is always around. She and I are not friends we are acquaintances but it does not bother me. Then I saw who she tagged. Michael's ex girlfriend. Why because they are best friends. Surely she knew that I would see the picture and that her best friend would see the picture why would you tag a picture of my husband? Does not make any sense to me at all. So I deleted her from my friends on FB. I am very non-confrontational, I did not start drama but I don't want to look at a picture of my husband on my wall tagged for his ex girlfriend. (This ex was the one right before me, and from all accounts she broke his heart by breaking up with him suddenly. She is married with 2 kids so I don't think she wants my husband or anything) As I was coming back from lunch this acquaintance texts me and said " OK!!! I saw that I was deleted, if it had anything to do with the picture then I am sorry what the heck did I ever do to you?" So I told her, it was not the picture it was the tag. Why would you take a picture with my husband and then tag his ex girlfriend. Not his wife, his ex girlfriend. So it escalates into her saying UR NOT my best friend she is! Duh I don't want to be, I don't even want to hang out. I just don't want to see pictures of my husband tagged to his ex. Coincidentally she has never tagged any of her pictures to her friend NONE of them except that one. Interesting huh? So anyway, I keep thinking did I overreact?

Was I wrong?