This app was mentioned in 3 comments, with an average of 3.33 upvotes
out of curiousity, what makes you 80% convinced they are fake? Do you known the person who sent the photos to your aunt, and that's why you think that? Or because they look like those "ghost app" pictures? Just wondering why you think that, as I think maybe your gut reaction is telling you something?
edit: also, the girl looks a lot like the ones in this: https://play.google.com/store/apps/details?id=foto.fantasma.broma About fifth image along....
...more searching and found this Facebook link that has the original "photo" of that girl.... facebook link of image Definitely faked.