Hope2be, I don't know how old your granddaughter is, but children respond in a positive way to consistency and stability; I think instinctively she must know that you are the provider for those things in her life. If she's old enough, maybe you could talk to her and apologize for whatever behavior you feel was inappropriate on your part, maybe explain that it's difficult for you because you still love her mother, but your job is to do what's best for her (granddaughter), always. Just reassure her. Bless you for taking on that responsibility; I know it can't be easy.