Alpha's Little Wolf

This story is about a little five-year-old, Isabelle. She has been through more than most people have been through in a lifetime. Isabelle's parents were killed and she became a rouge at the age of five. One day when she's sitting in the forest crying, the most terrified Alpha Xavier finds her and brings her into his home.
Xavier hates rouges, but when he saw her, he knew he could never hate her. Xavier has always wanted to be a father, but he always thought he would have children with his mate whom he hasn't found yet. He thought that raising Isabelle wouldn't be that hard, but Isabelle has a terrible past that comes back to haunt her.
How will they overcome this? Will Xavier not be able to let Isabelle go?