When you finish pubertiy
Female breasts stop growing and developing by age 18.
Yes, it is definitely possible that you are not done developing. Most girls stop by age 17.
Developing
Breast size fluctuates throughout a woman's life (e.g. pregnancy, period, weight, etc.).
As a girl progresses through the stages of puberty, she will grow taller and her body shape will change. Her chest will appear less flat as her breasts begin to grow. The first sign that a girl's breasts are developing is when small bumps (sometimes called "breast buds") become noticeable on her chest. Some girls find that their breasts or nipples start to tingle or itch whilst they grow. These feelings stop when the breasts stop growing.
no
no
No.
Nothing, its all in the genes. If ur mom has big breasts u will to
No sweetheart, your breasts wont stop growing! Wearing an underwire bra can actually keep them "perky."
No it depends when she start developing breasts
It's all about genetics. You haven't started developing yet because your mom and grandma probably didn't start developing until they were older. Don't worry about it though. Your breasts will develop in no time.