I am not really in the position to answer, but from reading your post I understand why you would feel uncomfortable. Hopefully, someone will come along and fill the void in her life. As for you, if you know that the guy who you have married is a good man and you have his respect then don’t even think about giving up a loving relationship for the immature behavior of an ex. Sounds like she is making a spectacle of herself especially since she has already been remarried and divorced since the original marriage broke up. She is more to be pitied…don't let it get you down. Good luck.