Is it normal i still feel guilt for abusing my sister?
My father was very abusive, physically, emotionally, psychologically and to some extent, sexually to myself and my sister (but more directed towards me) while we were children. He would beat us, berate us, encourage me to kill myself (often offering me weapons), perform "inspections" on my private parts (I'm a female), tell me I am worthless and lock me in the house for months on end without TV or anything to entertain myself, he made me clean 8-10+ hours and beat me relentlessly to the ground if there was so much as a crumb on the counter. He threatened to put me in foster care if I got bad grades and constantly told me that I should die. I had a learning disorder in Math, but he ignored that and bringing a bad grade home meant that I was going to have to stand at attention for hours while he told me that I am dirt, before and after being beaten. If I cried, I got beat harder.
At a young age I acted violently in response, bullying other kids. Every teacher I had told my dad to take me to a shrink and my Dad did. He was military, and he was good at acting. He took me in and mentioned nothing of my home life, telling the shrinks that I was lying and he didn't understand why. They diagnosed me as mentally disturbed and every time I begged a teacher not to make me go home, he would give them the diagnosis and tell them that I am just making it up. He'd later beat me for telling on him and convince me that I deserve to be beaten and that I was lying. He convinced me that everything he did was a figment of my imagination, if I didn't admit it, I don't eat. (Years later he confessed to this, saying that I deserved it because I was a terrible child). I wasn't going to go to the teachers and pull down my pants to show them the bruises on my butt/legs/hips.
So I did much of the same to my sister. I never realized it. When Dad left, Mom took over and she was less abusive but still violent, mean, telling me to kill myself and that I ruined her life. I was a bully to my sister for years, laughing at her and berating her. It wasn't until after I left that I realized what I did. I never considered what my parents did wrong, no one ever told me it was and I never told anyone what my parents did because I felt that I was truly mentally disturbed (afterwards, I saw many many shrinks, even drug-pushers, that wouldn't even diagnose me and ones that would diagnose me gave me mild diagnoses. I was declared mentally normal with PTSD and symptoms of child abuse. I've not found one person that would agree that I am mentally disturbed, they rather that my father was.)
It wasn't all bad. He bought me toys and sometimes he was really nice to me. He'd say he loved me and told me that he beat me because I was a terrible child and he only did it because he loved me. He said it hurt him more than it hurt me and he could just keep going until my skin tears and I bleed. He said it could be much worse and he is kind for feeding me and giving me stuff, considering I don't deserve to live. My therapist told me that I use those excuses to justify his violence, but Dad was right. He could have killed me, and I deserved it. I broke up their marriage, as well. My Mom cheated on my Dad and I saw, and when he asked me I told him about it. I didn't want to, but Mom wasn't buying groceries and she and her roommate were always teasing me and threatening to kick me out or kill me and he said he would make it all better.
What I have told you (I've just gotten to the point where I can speak about it openly without feeling completely ashamed of myself) is just a small part of the story.
I have apologized to my sister, who was too young to remember most of this, and so far am improving (I moved away and when I return, my temper is less every time). I know they still talk about it but I have apologized and tried to make amends. is it normal that I still feel so guilty even though I have changed and I had no idea that what I was doing was wrong?