Beware RANT ahead.
Ok so just for background my sister and I are just under 3 years apart, I’m older, and we are polar opposites. She's at a school in a different state 9+ hours away by car and she is only home during the summer briefly and an occasional week for Christmas. My wedding is labor day weekend so end of summer. She is 26 and still in school which is great for her I just think it makes her out of touch with the rest of the world. Anyway, about a month before my FH and I got engaged (we were going to Mexico so my family assumed we would get engaged on the trip) my sister texted me out of the blue and said something like “If you get engaged are you going to make me MOH because if not I’m gonna be really upset and I want to mentally prepare.” Mind you we literally barely talk except for when she is home for the holidays. I also have a very close best friend who is more like my sister than my actual sister, and I was her MOH for her wedding in October. So anyway, I tell my sister "well I was going to make you maid and Lauren [friend] matron". In reality I would really just make my friend MOH and my sister a bridesmaid, since she hates everything feminine and lives too far away to help and is broke. HOWEVER I know my parents would give me crap if I didn't MOH her, and they are paying for like half our wedding so I feel like I owe them. So anyway that's what I tell her. Time comes to go dress shopping and she was going to be home and asked me to make an appointment when she was home so she could go so I did. She came and was completely un-helpful the whole time, on her phone/in her school planner. At one point I asked her which she liked better to try and get something out of her and she said "well your body is the same in both, so they look the same". WHO SAYS THAT? Anyway after that day I texted her and said she made the experience horrible and if she pulled anything like that again she doesn't deserve to share the title of MOH with my friend who is an angel and doing so much work. That was in November, I have sent some things like invitation pictures to her to try and make her feel included and she just doesn't answer. I really don't think its fair to my friend who is putting in all the effort and money and TIME to make them both MOH because my sister is just unhelpful. Should I just make my friend the only MOH and make my sister a bridesmaid or suck it up for my parents?