Physical & Emotional Abuse Support Group
Abuse is a general term for the treatment of someone that causes some kind of harm (to the abused person, to the abusers themselves, or to someone else) that is unlawful or wrongful. No one deserves abuse, period. Abuse can be emotional, physical, or sexual.
Try not to be so hard on yourself. You probably are saying the exactly correct thing, but she does not want to hear it. Try to not talk about him at all. Do not frame your comments in the "no matter what he said" scenerio. Let her know she is loved and loving. That she is young and attractive and that the world is her oyster. Keep her busy but try not to let her know that's what you are doing, otherwise she is going to feel "managed". For all the conversations here regarding your sister, I must admit that we know next to nothing about you. Are you married or in a relationship? If you feel that your relationship is a healthy one then talk to her about why it's that way. Try not to say "This is why my relationship is healthy and your's wasn't.." just say "this is why my relationship is healthy.." I think she will learn much better by example than explanation.
Good luck.