My FI's childhood best friend just RSVP'd for our wedding in April. However, he added a +1. This, in itself, is not really an issue. What is an issue is that his new girl is my guy's ex and my childhood ex-friend. We have a very long and very bad history. I am honestly shocked that she would even dream of coming to our wedding in the first place but it was her handwriting on the RSVP. How do we deal with this situation? The last time I saw K we ended up in a fist fight... I do not want to repeat this experience at my wedding.