My sister is 13 going on 14 and my mom called me into the room and told me "tell your sister that it's normal for your boobs to hurt while growing and it's normal for them to be different sizes too" and she said "I just don't think it's normal there's something wrong with me" because one boob is bigger than the other and she's sore and for some reason won't believe what my mom and I say about it 😂