big sister mean

I have a 2 year old and my second just turned 1 a few days ago and her big sister is so mean to herđŸ˜© idk what to do or how to make her stop but any toy that I buy for her sister she takes it from her, she doesn’t allow her to play with her.. if she sees her with something in her hand she says “give me” and snatches it from her making her cry. I can tell she is jealous and I breastfed so my second was and still is nursing and my first is always on me like her sister which is fine but she doesn’t allow any other person to hold her bc she’s trying to get the spotlight. anyone else been through this? how do I fix it? i’m trying not to look like I care about the other one more her sister just is very needy with nursing and she’s super clingy. it makes me upset though that she is so mean to her and she’s a kid I get it but I want her to be nicer