22 F4A - Bigger than my Big Sister

I grew up in a busty family. My mom is a DD cup. My aunts on both sides are anywhere from a C to E cup. In middle school, all the girls were worried about growing boobs. I always figured I would. I'd be big just like them.

My older sister grew some large boobs. 32DDD. She absolutely loved them. Practically overnight, her identity became "the big boob girl." She started wearing low cut tops and flirting with all the boys. She thought she was so amazing because she had big boobs.

Then, I came along. By the time I started high school, I had purchased my first 30D cup. I had a nice figure. I thought that was going to be the last time I needed to get a bigger size.

Except it wasn't. I outgrew everybody in my family. End of freshman year, I was a 30F. Sophomore year, 30H. When I started college, I was a 30K - the largest in my family by far. I've been known as the big tit girl ever since and I've never seen my sister without a pang of jealousy.

Did any of you outgrow your older sisters? Guys, know any ladies in your life this happened to?

If any of you (preferably women) want to talk about being busty and share places to buy bras, I'm game for that too.