Worried to have kids because of my mom...

I know my mother will be a good grandma, but just like me she has anger issues, but worse. I am not pregnant yet, but she knows we are trying. She has already proved she will be super controling over me on how a raise my children. She tells me how I need to train and punish and handle my dog. She told me that when I get pregnant that I am not allowed to find out what the gender is (I will anyway). She undermines me with my dog. I tell her the rules I have set I'm place for her such as no human food, she gives it to her anyway. She isn't allowed to run and play for an hour after eating because her breed is prone to bloat at a very high number, she does it anyway, putting her at risk of death. I'm just not sure how it's going to work out with my kids and her. I would need to baby sit since my husband and I both work, but I'm nervous to let her. She use to be very mean with my sister and I sometimes. Any advice on what to do? Even if I sit here down and tell her strict rules she would break them.