I've been to my fair share of weddings, and I don't think I've ever seen anything like this, lol.

It leads me to think the photographer and the other lady have had some heat in the past with each other, because it wasn't a polite "please move" type thing, this was aggressive.  The photographer displayed cat like reflexes and hip bumped the stepmom out the way!

It happened in Kentucky, so I'm 99.8% sure that bourbon was most likely involved in both of their decision making skills.