I get that all guests married and in serious relationships should bring their spouse/fi/bf/gf. I completely agree and we have honored that. However there is someone that we absolutely do not want to attend our wedding and that person is the spouse of a member of the wedding party. I know we sound horrible. But this person committed a crime against us (admits guilt and will be convicted) and we are very uncomfortable being around this person. In this case can we explain that we do not want this person attending as a guest?