My mum's making me be friends with my brother on facebook so she can check my account .?

Not photos but when you go to post a status next click the little lock in the bottom right corner. A box will appear. Click "Custom" It will then pop up another box and where it says HIDE FROM start typing your brothers name and click on it when it pops up. Then click "Make default setting." He wont be able to see your posts from then on.