Not 100% sure what the coloration is, but I'm having a rough time spotting that nipple slip. Logically, that shirt collar is nowhere near low enough to expose any nipple, IMHO...

Maybe you need a better computer screen.

you see nnipple but she must be deformed for it to be there

With that camera angle, it's a tough call.
Also, she's flat as a board, so that makes it easier to see.