Problems with grandmas to be?

Anyone have the grandma to be telling you how your going to raise your child? My mother in law loves to tell me how she's going to give my kid pop and candy (I'm super against this until they are much older) She loves to tell me that my son will stay with her and how she's going to take him places... I'm super over protective and I plan to breast feed so I have to tell her no all the time. She can't take him places as a newborn which is what she thinks she can do:./ it pisses me off. Anyone else having a problem with the grandma to be or mother in laws?