When you invite a guest to stay in your apartment, presumably you don’t EXPECT them to invade your privacy, or else you wouldn’t have invited them in the first place. I know I wouldn’t invite anyone I couldn’t trust.
This is why I wonder how well the OP knows his hosts. Perhaps he needed a place to stay and was set up by a shul, or a mutual friend, and in reality has never met these people. In that case I would understand. But if he knows them personally I still maintain that it’s weird.