Help-I need to vent

I don't know how to handle my situation. My 19 yr old niece lives in Fl. She is pregnant and due in Feb. 2007. I am getting married in March 31, 2007. Being that our family is really spread out she called and asked me if I would mind having the baptism on the Sunday after my wedding. I told her that I didn't not mind at all. My older sister is helping them organize it because she also lives here on LI. Yesterday she called me to ask what time my ceremony is on Sat. I asked why and she said that the church doesn't baptize on Sundays and they will only do it on Sat and she said that being that my ceremony is at 1 pm she wants to do it at 9 am ON MY WEDDING DAY!!! I said are you kidding, it's my wedding day plus on top of that neither me, my twin(my MOH), my mom etc.... are not going to be able to go. She said: Of course not. HELLO??!!! It's like she doesn't even give a crap if I go or not... I don't know how to handle this. I am soooo desperately trying not to be a bridezilla about this....