Me and my sister both pregnant with our first

I'm 17 weeks pregnant with my first and my sister just found out she is pregnant last week with her first also.  Is it bad that I'm not completely excited for her? I know it sounds a little selfish and I just feel like it was my time to celebrate this special time and that fact that it's our parents first grand baby, and now I have to share it with my sister. Plus she thought it would be a great idea for us to have a double baby shower, and I believe that no one should try to outshine the birth of my child! Please no rude comments!!