Girls, Bra shopping with brothers?

My parents are passed. And I live with 3 older brothers, one 17- 14,(twin) and 20. My oldest told me I need to wear a bra. He's taking me to justice to get a bra. Should I get padded? Is he gonna watch me try it on? Are justice bras for baby's? I don't know what to do!
Girls, Bra shopping with brothers?
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