Really touchy subject... should I say something? (sorry long)

Okay... so as some of you know, I just found out yesterday that one of my BMs is pregnant. She will be around 7 mos by the time of my wedding. Let me first say she's my cousin and I love her very much but.... here goes:

When I got engaged, her first words to me were 'oh... I was sure it was going to be ME before you!' Um... I was unaware it was a race.... especially since I am the oldest of our circle of friends. I 'should' be first. Anyway, since then I have felt a teeny bit of tension with her. I really felt that she would try 'steal the thunder' or whatever.

Sure enough... a few months after I announced the fact that I had moved up my wedding from 2004 to 2005 she announced that she was going to start trying to get prego with her live-in BF (who was supposedly going to propose any day now & btw still hasn't). Well no one responded well to that considering the fact that she wasn't married or even engaged. So she claimed to reconsider and wait for the ring instead.

Anyway, here we are 6 mos later and she's pregnant anyway. Now, I'm not saying she did this intentionally just get married before me or steal my thunder or anything but it certainly doesn't help her case. Whatever.

The problem is this.... she did tell me that she will most likely tie the knot before the baby is born. My wedding is 6 mos away... when and how exactly does she plan to do this without it affecting my wedding? She claims she's just going to go to the JOP or whatever but she also claimed she wasn't trying to get PG. I'm also concerned about her mom because she's the type to throw a huge gaudy bash a month before my wedding just to upstage me (ie - my mom, her sister).

Should I say something to her? Is there anything I even can say to her? Believe me, I'm fully ready to blow this whole thing off and not even sweat it. I know how petty and sordid this kind of stuff can sound so I am fully prepared to be the bigger person here... I just feel the instinct to protect all my hard work in planning my wedding. And, if there is a chance that she'll wait or do something smaller I feel I should act on it to save myself some frustration later on. I mean, my wedding is less than 6 months away....

So.... should I say something? What can I say??