She is one of the most caring people in the series, she loved her husband and would of done anything for him and to protect him. She was NOT a deatheater. Her son was, only because if he wasn't Voldemort would of killed Draco. And when Draco was a deatheater, she spent most of her time worrying and grieving. And on top of it all, she lied to Voldemort that Harry Potter was dead to keep him and her son safe. Just because her husband was a deatheater, doesn't mean she was a terrible person.