My parents are ALWAYS home!! i want some privacy!!!!?

I'm 14 year old girl and I want privacy I want to be left alone!! I want to do things when no ones home! My parents are both over 50 and they both don't work and are ALWAYS HOME. Always in the living room. I want to masturbate but our house is small and they are nosy so they would probably come knocking at my door while I'm about to orgasm. What to do? I been Horny lately. And I don't hate my parents but I just want to be left alone sometimes.