And, btw, if you pay rent to live there, you have every right to establish "rules" for your room and even keep it locked whenever you want. You can have off-limits hours, rules about keeping it clean, shoes on or off, no food, etc. Just because it's the room with the biggest bed doesn't mean a thing. And if you don't like the bed, give it to them or sell it and get one you like. They are in a relationship with you - they're not your bosses. Express what you need and accept that you deserve to do so!
Independent solo polyamorist seeking lover-friends willing to invest in friendship, companionship, and love, but without a need for partnership.
Never confuse commitment with exclusivity, love with ownership, nor sex with intimacy!
For me, it is far better to grasp the Universe as it really is than to persist in delusion, however satisfying and reassuring.
~ Carl Sagan