Abigail wrote this story today...
One day there was a nice box delivered. And inside the box was a little kid. Abigail was very happy- she had her little sister. They named the little sister Gabriella. Gabriella had a new big sister! So she had a very nice time with her big sister because she was very nice and she loved being the little sister.
Then came the day of her birthday. All her fiends and Abigail presented her friends to her little sister named Gabriella. Now they had a good time. Until it was time to open presents. There was a special present hiding behind all the other presents. And she opened the first box and on top of it it said that it had a name called "big sister." And she loved it when she opened it- it was a Barbie doll and she really loved it. It was beautiful.
Then every one she opened. She opened Donna's and Tinna's and Tina's and a beautiful sparkle.
And they lived happily ever after.
Clearly, she is slightly confused about how her sister will get here. I think this may have been influenced by her recent acquisition of her Cabbage Patch dolls.