Ok, so I got in a major fight with my sister (who is also one of my MOHs). Here's some background : my sister is married with two kids (my niece is 13 and my nephew is 8). She works full time as an accounting controller. She is a great mother/wife/sister/daughter. She does everything for her kids. They are involved in soccer, dance, computer classes, swimming, etc. My parents live with her & her husband. They take care of the kids while she is at work and help her as much as they can.Ok so here's the deal...My wedding is April 10th, 2010. My niece is 13 yrs old. I am planning the biggest day of my life. My 3 sisters are my MOHs..and I must say they are the BEST. We have MOH meetings where we discuss the Bridal shower, the wedding, favors, etc. They are all helping, but my sister with the kids is actually the one that has the best CREATIVE MIND. So she's been the best one with ideas, creativity, etc.HOWEVER, lately she has also been incorporating planning for my niece's quince that is 2 years away. At first it was just about locking in a venue. She did that and got a great deal. I was very supportive of that and even gave her all my research stuff. But now she's digging into the nitty gritty. She already bought the flip flops for the guests for the dance floor, tank tops for the quince court, etc.The other day she came with me to the invitation store and she was looking for invites for my niece's quince (when it was supposed to be about helping me find my wedding invites).I've joked about it and kind of brushed it off...but finally today I couldn't hold it in. I texted her saying "it's really hurting my feelings and that she is kinda of stealing my thunder"- 2 years is unnecessary. And in a way she is also taking this joy for planning my niece's quince from me and my mother and sisters because by the time my wedding is over, she's gonna have done everything for the quince and there will be nothing for us to do.So I tried ignoring her calls after my text because I was with my parents and just didn't want to talk about it. My dad got annoyed that she kept calling me, and I had to answer. We got into a screaming match and I started crying. My parents were stunned- but my mom was happy that I finally said something, because every time she made comments, my sister would snap at her.My sister pretty much said "You are wrong. I have to plan. My life is too busy. This topic is too sensitive for me. I will no longer discuss this topic. You think you are always right".She blew up on my parents when they got home too.So now, we haven't talked since this afternoon. I guess we're in a fight. I don't know what to do. I even told her "I'll take something off your busy plate. forget helping me. Plan your daughter's quince."This really hurts me because my sister is such an awesome person, great sister, great mom. I want my niece to have the biggest quince and have the best of everything. But can't she just wait 7 more months to start planning. She already pretty much locked in the hotel. Why can't everything else wait till later? she's gonna use my vendors anyways....she already said that. I just want to enjoy my wedding planning. Am I being a bridezilla?