User blog comment:Viperinelight50/Bad, terrible, awful news/@comment-27357780-20160808150929

Well there's two things to prevent it from ever happening again. 1. Logging out in the first place. If you want to keep your brother from invading your space, log out.

Or 2. Just tell your parents the truth. They're there to help you. Just calmly tell what happens and they'll have a plan. (Even if your brother can get you in trouble, it's not nice to tattle-tale about you or him). Beside, they care about you and your bro and they're here to help.