I am having three wedding showers. One for my friends, one for family and one for work people. My mother and I work in the same department and so there is a mother and daughter duo who wants to throw me a bridal shower. I was going to invite my wedding party girls and then my work friends. Since my mom and I have overlapping friends at work I feel that I will make her uncomfortable by inviting my step-mom. I have always heard that you are suppose to invite mother of the bride and mother of the groom to all bridal showers. Does that apply to step-mothers? My mother and step-mom tolerate each other but are by no means friends. I just do not want to hurt anyone's feelings and also do whats proper etiquette. Any help?!?!?!?!