Am I right to be Creeped out?

When I was between the ages of 8 and 9, I had a nanny who I used to sadistically torment. I sued to make fun of her for being poor; for being ugly; I used to tell her to go die; and I used to become violent towards her: the violence included hitting her with a belt, smacking for with a frying pan, and whipping her with a cane. When I was in 3rd grade, I had a journal for school, in which I was supposed to write stories in; and I wrote a story where my nanny gets arrested, tortured and killed, just because of how ugly she is. One time, she needed to use my computer doe an urger assignment, and I refused to let her use it, claiming it was worth more than her value as a human being, and she began crying as I began laughing. There was another case where she agreed to give me a video game in exchange for letting her use my computer, and when she tried to retract it, my parents docked it from her salary. I always used to hold money up to her face, claiming it was something she could never enjoy, while talking about how my room was worth more than any place she will ever live in. When I was 8, I also used to make threats against her and her family, but that seized once I got video games taken away by my parents. My strongest memory was when she coughed and turned to me to remind me to say "bless you," and I turned to her and said, "I know i'm supposed to say excuse me, I'm just not saying it to you because I don't respect you as a person," and she was horrified. The other thing I stopped doing after receiving a spanking from my mom is making racial slurs to her, just to inflict emotional damage.
Recently, she began calling me up, asking me to go to the park with her, have her cook for me, and to come meet her pastors. I am now 16, and I was only a kid when I did all of these things, so it is now a thing in the past, but I am still disturbed by the fact she wants to talk with me. My parents tell me that she is lonely, and is desperate for someone to hang out with; and that she felt bad for me as a kid because I had focusing issues, but that seems like a bizarre reason to get over what I did to her. Even though kids do things when they are young, and I was punished like a kid should be, it still seems creepy that she would want to talk to me. Does anyone else think I should creeped out, and if so, what should I do? The other creepy piece is that she seems so excited to talk to me, and I just don't get it.