Looking for a book and it is about a military guy who joined with his best friend. His best friend is killed and when he comes home for the funeral he and his friends sister gets drunk and sleep together. He goes back to his duty and she has a baby boy. He doesn't know about the baby until he comes home. The mother is I think on drugs and is not taking good care of the boy. The father takes him and places an ad for a nanny.
The girl that applies is kicked out of college because she lent her money to a boyfriend he took it and left. She couldn't pay her tuition. She sees the add he placed applies for the nanny job. and that's all I can remember.