I think I'm being monitored? Please help.

I live with my brother, who insisted on having the router in his room when the internet was connected. I didn't care at the time but since then I've been suspicious of him. He will often comment to me in real life, about comments I had commented on in various discussions on reddit, or mention specific posts I had been looking at. Again, I didn't think much of it right away, but over time there have been so many "coincidences" …

care comments connected discussions internet life live privacy real reddit room router