To me it was when.
My sister’s has her own room and bed since she was 14 and I am sleeping on a couch since I am 12 and only privacy I get is while sitting on a toilet we have moved homes 2 times. Both houses are owned but still my parents think it’s OK for me to sleep in living room.
Plus I once got slapped so hard that my ear bled for a mistake my sister made the same mistake but my father laughed it off.