I've never had any sort of growth in my breasts since I was about 12-13 and that was only very marginal, I'm now 21 and they are not only extremely small but more triangular in shape as apposed to full and round, I first starting worrying they wouldn't develop around 17 but years have past and they haven't changed at all, even if I put on weight they are still barely an A cup, my younger sister has normal full breasts and is a D cup, I'm sure there must be something wrong here?
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