When did we actually start growing up?

I was at work today and got a phone call from my older sister, that in it's self was odd because nowadays we pretty much keep in contact via email and text messages due to both of our randomly busy schedules. After I didn't answer I got a text message from her, "answer your phone asap!" I was instantly concerned. My first reaction, someone had died. Worried, I head back into the break room at work and call her back. She answers the phone and all I hear is:

"WILL YOU BE IN MY WEDDING PARTY!?!"

Obvi, the answer was yes, I'm pretty sure that was a given since, well, forever. I'm not even anywhere near being engaged and the one thing I am 100% sure about is that my older and younger sister will be standing next to me when I am getting married.

I was bouncing around work the rest of the day. I couldn't wait to get out and call my sister back and get all the important details.