How can you ask your mom for a padded bra?

If You feel nervous you and me are alike! I had her understand when I got the thinnest shirt i had so you could see my chest easily. It was kind of embarrassing but at least she got the clue and said, "dang girl, you need a bra" a real one. I did this in public. if that doesn't work you ask her if you could go to Walmart and get something for your needs. or when you are at a store you see a bra say , mom can I try it on. I promise she will buy it.