Quick short vent about respecting privacy

Just so this is off my chest, anyway you know what's sad? I was using my phone when my sibling asked for it for a second. So I exited out of my Google Chrome and handed it over. But when my sibling handed it back to me, it was already back on the app. Dude seriously checked to see what I was hiding from him. It wasn’t anything remotely bad or inappropriate, either. It was just a c.ai tab.

Anyway I'm sad lol. Can I just have my privacy respected? I feel humiliated for no reason. I don't understand why some people really think they're entitled to see everything there is on your personal stuff.