It's photoshoped, the jawlines below the hair are sharp, but the image isn't in focus enough to make those sharp lines, there's blurring on her chin area also, it's amaturish! But for a meme it's good enough.
If doing inappropriate stretches at the pool is wrong, then I don't to be right. But mostly my opinion is based on the assumption that she's got a hell of a bite so I don't want to get on her bad side, which looking at this photo, I'm guessing is her left side.