Are we sure it's her and not someone else?
Yes. What you do is go to Erica's Insta**** and find the photo. Then, you look at the comments and see that she has credited the "awesome" @gwburnsphotography. Click on that link and you go to his Insta****. Find the photo there - you don't have to scroll down very far - and you see this: "The incredible physique of @erica.cordie".
Unless he's lying too...
