Bridesmaid wants to step down but will let me make the final decision. What do I do?

I'm about to pull my hair out and I don't know what to do.I have a bridesmaid who has been nothing but drama since I asked her to be a bridesmaid. It's been one thing after another and she makes it very clear that she's only being a bridesmaid as a favor to me, not because she wants to be a bridesmaid. After she threw a huge fit about coming to the bridal shower about three months ago, I told her that if she was just too stressed over life, she could back out. She said no, she'd be there.We are now a week and a half out from the big day and I get the following message from her."Hi Sharkbait. I'm looking at the schedule and I'm really stressing about how I'm going to take care of my son all day. I don't really trust leaving him with someone else all day. I didn't realize that you wanted us to participate in so much.Also, his bedtime is 8 PM which means we typically start getting him ready at 7 PM. I'm willing to make an exception so we can eat dinner at 7, but we'll need to leave by 7:30 at the latest.If you can accommodate me, I'll still be a bridesmaid. However, if I can step down, that would probably work best with my schedule. I'll let you make the decision. You can pay me back for my dress. Hopefully it fits a replacement bridesmaid so you won't be out money. I would also be willing to give you some of the gifts back that you gave me."Just so many things....-- Her husband isn't capable of taking care of their son? -- She's known about the schedule for months and chooses now to say she didn't realize that so much was expected? For the record, I just asked them to have their hair professionally done (I'm paying) before the ceremony. -- She's also known what time the reception is since Christmas. This shouldn't be news to her. -- The whole tone of the message just irks me.Had she not been drama throughout this whole planning experience, I don't think I'd be ask irked. But she's caused A LOT of stress for me and now this.The sides won't be even, but at this point I don't care. I don't have plans to speak to her after the wedding and really don't want her face in my photos.Ugggggggghhhhhhhhh! via /r/weddingplanning http://ift.tt/2tbhk7Y