Normal to have negative thoughts about mother?

Its normal! My dad died when I was 10 and my mom began belittling me and beating me ever since. She kicked me out of the house at 14 and then began to mistreat my other sister...and kicked her out too. Now (20 something yrs later) she acts as if none of it ever happened! I resent her so much sometimes because she was never a kind caring loving mother. I sometimes wonder if I will care much when she is gone. I try to forgive and forget...and never treat my children as she treated me. Your not alone. . Maybe you could see a counselor and get those feelings out..it helps to talk about them.