Nope, I didnt add it in post. I had a white shirt with a peice of glass on top of it. Flash off camera, shot through white unbrella (I can remember what angle I had it positioned, camera right forsure..), and a silver reflector camera left not too far from the subject.
I did try a few shots without the glass because I wanted to avoid the reflection but I wasn't overly happy with how they turned out.
Also I used the 70-200 F4 L for this.