The way she follows them around, you'd hardly know that she has only been their sister for 6 weeks now. It's like she has been their shadow for all of her 2 years. But she hasn't.
She is literally giddy when I tell her it is time to go outside and wait for the school bus and wait for Tess and Jude. She runs to the bus doors as they open. She waits for them to come down the steps with her biggest smile of the day.
She is their sister, and she totally gets what that means.