Hi S.! I am in the same boat! I have 3 kids....2 are girls...ages 10 and 7 (see a pattern here?). My oldest used to ALWAYS ignore her sister. She wouldn't share her toys but when the younger sister got something new, the oldest wanted to play with it. The younger wanted to play with her sister so much that she shared, in spite of the fact that her sister never shared. I just constantly told the older one that her sister loved and adored her and wanted to be like her. I reminded her that while she was still young herself, she was the role model for her younger sister. And, I asked her repeatedly, how would she feel if her sister wouldn't share with her. Some times I forced her to share. Some toys were "sacred". Usually it was brand new toys that were sacred. If she had them for awhile and they were no longer "new", she had to share. Now, they both do pretty well at sharing with each other. They have friends who are also sisters and they will all play together very nicely. But we still have toys that are "sacred". My oldest just had her birthday party and it was up to her whether or not to share with her sister at this point or play by herself. Guess what? She chose to share so that she had someone to play with! It all works out in the end. When they are little, they are still the "center of the universe" and don't care about other people's feelings yet. It is up to you to instill that in them. And it sounds to me like you are on the right track towards doing that! Have faith! It will get better!