Yeah, I used to live with my grandparents and had a room at their house. After I moved out, it became their room again. I recently moved back in with my grandmother because my grandfather passed away, and we still have our family reunions here, and I still wouldn't have sex here during one, especially with someone I haven't even introduced to my family as my bf/gf. And my door does have a lock. It's just disrespectful.