Mavy said:
Based on this I sent it to a friend of mine that is a graphic designer, has extensive experience in retouching photos and formerly ran the art production shop of a high profile Chicago promotional marketing firm. He is really good at analyzing the details of the grain patterns in photos among other things. This is what he wrote back to me:
"It looks to me like a retouch job. The grain pattern of the
breasts and the rest of the image doesn't match, nor do the skin tones if you look at them closely... in fact the image looks "blotchy" where the breasts look they were cut into the image."
Good call Mavy! Looks like you are correct.