## Prosthesis
A Google search finds several different pictures of Jasmine Tridevil, which suggests it is not a case of a simple photoshopping of one image.
At least one reporter claims to have interviewed Jasmine Tridevil.
There are some reports (1, 2) that suggest Jasmine Tridevil is using a prosthesis
> Alisha Jasmine Hessler, once filed a complaint under that name with the airport in Tampa, FL. Among the stolen items was a “three breast prothesis[sic].”