"Your're under our roof, so you have to obey us" What does that have to do with obedience?

My mom screamed at me today. Said that I was under their roof so I have to obey them. Said that they own the house so I have to obey them as long as a I live there. What does the house have to with obedience? Why do I have to oby them if I live in the house? Unlogical.