Facebook Privacy questions?

[Kappiswhack]

So my mother has a facebook and im friends with her and while looking over her shoulder one day i can see that her newfeed consists of almost every comment i make or wall post i post.
how can i block this so she cant see what i comment or post in my privacy settings?

[Nicole]

okay i have a facebook 2 and i made one without my mothers permission.then she was mad then she added me as a friend.also im 13.u go to status and click the little lock icon and type peples names u dnt want to let see your newsfeed