Say that they hurt when you run, and you need proper support
Tell your mum that you really need a bra and that it's stupid that you are not wearing one already. Mention how they hurt when you run and need support (like previously mentioned) and say that you dont want them to go saggy from not wearing a bra. Perhaps start with one with less or no padding then ease her up to the idea then start buying whatever ones you want.
just buy one
your mom won't let you get a real bra? that's messed up. Tell her it hurts and its embarrassing when it get cold. I don't know, she should understand all that
Tell your mum that you really need a bra and that it's stupid that you are not wearing one already. Mention how they hurt when you run and need support (like previously mentioned) and say that you dont want them to go saggy from not wearing a bra. Perhaps start with one with less or no padding then ease her up to the idea then start buying whatever ones you want.