We are the grandparents on the bride's father side. We do not have the best relationship with daughter in law or bride to me. We were not invited to the engagement party, the bridal shower or the the rehearsal dinner. The mother's side of the family, including aunts and uncles have been invited to everything. Of approx. 150 guests attending the wedding, we are the only 2 on the bride's father side that were invited. I am really uncomfortable attending this wedding. We were not good enough for any other events and not sure if we should attend but we don't want to hurt our son's feelings and not go. Any advice???