No, what's really odd, well not really, is your willingness to jump to a conclusion based on a single photo and a single incident that you, if it was you in person, witnessed at some time in the past.
Your inability to grasp the fact that just because you don't know someone means nothing in regards to whether or not they can properly sex a snake.
It could be expelled fat. It could be any number of things. You don't see most of us who have more than 2 minutes experience jumping to conclusions and insisting that someone must have mis-sexed that snake because it looks like something you saw a female do one time.
This isn't exactly a mystery that has a time limit on solving it. A day or two isn't going to make any difference.