Living with the West Boys

Danny and her little brother Harry (he knows her as his mother) had to move in with the West family because they were the only 2 that made it out of the car accident. So they were forced to go live with this family. Danny doesn't know what to do because she doesn't want Harry to find out that she is her sister.
She is protecting him from finding out that she is his sister because their mother just gave him a name and birth and she has taking care of him since.
What will happen and will she make it out.