My Friend's Mom Is Worried About Me?

[Bella]

I have an ask.fm and a while ago I was getting hated on. Apparently, my friends mom checked the computer history and saw my account, and clicked on it. So she saw the hate and was worried. She said that she was going to tell my parents but my parents don't know, and I didn't want them to know. My friends helped me out and the hating slowed to a stop. My friend told her mom to stay out, so nothing happened. But her mom still checks my ask everyday. I took the link off my instagram, but I'm worried she'll still use her history to check it. Is there a way to block her if she doesn't have an account? I don't want her to keep checking on me.