Jumping in from August, but I had to write.
I went through this when my mom was pregnant with #4. I was about 10 at the time and I was so MAD when I learned the news.
But, when my brother was born, I was the "little mama" trying to nurse him and everything!
I think your dd needs some time to digest the information. And, I think it would be helpful if you can explain to her how your family will change in wonderful ways. The LOVE from a baby is amazing - and I think in time, she'll feel much better about the situation.
But, another thing I would talk to her about is her friends. I had a friend who was in college when his little brother was born (he was 20.) And, unfortunately, SOOO many friends and people around town were talking badly about his mom for getting pregnant so late in life (so was just 40.) Of course, he LOVED having a little brother - but it was really hard for him to hear the negative comments. Maybe your daughter is experiencing this?
GL mama! I know it's hard to be really excited right now when things seem upside down - but I really think she'll come around.
Steph, wife to C, mama to O :, E , and I :.