Let me start off by saying I've always known my sister would be my MOH but lately her attitude has made me unsure of my choice. She is my bestfriend yet we are complete opposites. A little back story: my sister met her current bf back in June of last year. He has 2 sons from a previous relationship. One is 4 and the other was 6 months old when they started dating. That never set well with family and friends. Needless to say she is now 5 months pregnant with his 3rd son. Now here is the dilemma: I asked her to come help with the invitation envelopes and when she arrived she grunted and said do we have to do this? But went with the plans anyway. A few days later I asked her to come with me to make a final decsion on a dress and to purchase it. She grunted and moaned and asked what time? I told her 5:30pm she grunted and said fine! I was upset so I called my best Gf and told her what happend. She dropped her plans and said she would be their. I also invited my future mil and sil. My sister mil sil and I all drove together and best Gf would meet us there. On the way my sister tells us she wants to wear a short wedding dress that's skin tight to show off her bump. I say that is not going to happen. While at the bridal store my sister immediately takes a seat. My mil has to help me into my dress. My best Gf hadn't arrived otherwise she would have helped me without a doubt. I find a dress I love and so did everyone else. I try on a long veil and my sister loudly protests with a NO NOPE. I ask why? She just keeps repeating "it's too long" without further explanation. I purchase my dress and we all drive home. The following week my sister was going to revel the sex of her baby so myself fi my children all meet up at my fathers house. After she tells us the sex my father starts asking about wedding plans. I showed them a link to my ring I ordered and my sister asks to see. I show her and very loud and proud she huffs "it's not even a full carat". I tell her that I don't care about that kind of stuff. She then mutters some snickering comment to her bf who recently purchased her a ring. I ask how much was your ring she says over a carat about $1500. I just respond with ah ok. My sister has an ultrasound and they move her due date to exactly my wedding day! I asked her what she wants to do. She says find a back up. My sil and NFC write me saying they are going to host my parties because they think any idea they have my sister is going to shoot it down! I offered to host my sisters baby shower in June since she is my best friend afterall. I ask her to come up with a guestlist so I have a rough number to work with. She wants this shower to be at a park in between each family's home so it's equal driving distance for the bfs family and ours. Last night I get an email from her saying " so I came up with my list. 66 adults and 24 kids a total of 90 people!" I write her back and explain I can't afford a 90 person shower a month before my wedding. Where did she expect all these people to sit at at a park? And if she wants to continue w a coed shower she needs to enlist in more help! My fi has had it with her. They never really hit it off either. He thinks just simply kicking her out of the wedding party is the solution. Is she being over the top or am I just being insensitive? I really need an outsiders view. I have no clue how to approach this because I'm afraid of her being irrational!!!