My Mum thinks I'm flat chested (when I am really not), what do I do?!

Hello

Breast develop as buds even before puberty [periods]. Breasts continue to grow till the age of 18 when they reach their maximum size. Your areolas will grow in diameter and nipples will protrude. Its perfectly normal. Some girls show breast development early, while some show late development. It's perfectly ok for your mum to be worried about you. Rest assured some women are have small breasts, some normal and some have full sized breasts. You can always visit a doctor who can evaluate your hormone levels for good measure. Feel comfortable with what you have. Women with small breasts have breastfed babies and get plenty of love and attention

Your mom probably wants you to have a larger bust but is not admitting it.

What do you do? You don't talk to your mum about your breast size. You don't need her permission to buy a bra, and you are capable of degerming your right size, so act like a woman, and do it. You'll probably find the saleswoman to be a pleasure to deal with.