Sister got engaged - planning her wedding 4 weeks after mine at the same venu

[JessieJane]

I have been engaged now for a year, and have been planning my dream wedding at my parents cabin. It has taken a lot of time, money, effort and organization. We have had our date set now for over 9 months (late June 2013)

 

Three days ago my sister got engaged. She mentioned when she got engaged that she wanted to do a simple backyard wedding. While we were out bridesmaid dress shopping for my wedding last night, she told me that she was thinking that they wanted to have their wedding late July - which would be 4 weeks after mine. I was a little disappointed - thinking that she may be stepping on our toes. Then later she dropped the bomb that she was also going to have her wedding at my parents cabin. 

 

I can't help but feel like she is completely overshadowing all of the excitement our family was feeling, and that she is stealing the thunder away from my special day. I want to find a way to talk to her about it but do not know how to say it without sounding like a brat. Any thoughts or advice would be helpful!