Show My little sister what family is about.

She is not really a sister, she is not related and we cannot adopt her, but her mother is complete shit. So She has been living with us. I love her as much as I love my real sisters. However, I worry that sometimes she does not know how much she is a part of our family. I feel like she is trapped on the edge and I don’t know if she wants to be a part of it or wants to be left out. But I am not going to give her the choice. She IS my sister. I love her, and she needs to know this. I will step up and be the older sister that my real sisters have taught me to be.