To the OP - I can totally relate. I was married just over a year ago and had 5 bridesmaids. You are NOT a bridezilla. You are under tremendous stress, you are paying for enough with this wedding and the last thing you need is a moh that flakes out! I say, stuff her, if she can't get it together for such an important event for you, then leave her to it. I cannot believe she is going to a party and cutting out early from your reception. That is selfish and immature behavior. Either stick to 1 bridesmaid or add another, different one to the date. Good luck, let us know how it goes