Who should sit in the front seat?

My boyfriend, who I also live with every other week, picked me up outside my apartment the other day and in the front seat sat his teenage daughter, so I had to sit in the back seat.

There is an age difference between me and my boyfriend and this made me feel small and that I was not an equal adult. Very ridiculous perhaps but do I have the "right" to think that I should sit in the front seat as is his girlfriend and the other adult?

Who should sit in the front seat?
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