I have gone through this type of nonsense too. My daughter wants nothing to do with her grandmother and you know what? I don't blame her one bit. They do not deserve to have these beautiful kids in their life if they are going to say hurtful things and act like an A$$!
Just my 2 cents from someone who has dealt with this BS too! My daughter is 19 now. A very smart kid that doesn't want to interact with unhealthy people, grandmother or not!