Hi everyone. I am planning my wedding for fall of next year, but I have run into a snag before I have even got a chance to start.We want to have a small wedding, one MOH, one best man.My sister and I have never had a close relationship. She knows it, I know it. Everyone knows it. She is very unreliable, and just recently was diagnosed with Bi-polar, which has just made it worse. She has started medication, but is not stable as of yet.For these reasons, I have decided to have my cousin stand in as my MOH. We are far closer, and I know that I can trust her with this responsibility. The other day I was at my parent's house discussing the wedding and my mom asked me "Have you thought about your sister being your MOH?" I replied "I have thought about it, but after long consideration I do not think that I will have her stand with me." I explained my reasons to her and she said "You know she will be very heartbroken. You can always have two" I told her that I wanted to keep the costs down and I don't want two. This effectively ended the conversation.My sister then was over on the weekend. She asked me if I had thought of anyone to be the MOH, and when I didn't say anything immediately, she said "Oh, touchy subject eh?" and started talking about something else.How can I confront this without feelings being hurt. I am so stressed right now, and I don't know what to do. If I had known that this was going to be such a PITA, I wouldn't have wanted to have a wedding at all.I don't want to elope. I want my family there to celebrate with me, but not if it's going to cause me such stress.TIA for your help.