I'm not sure how you got four, but I only see three. The upper right woman has her legs over the center woman's tummy and those legs are remarkably slender, so that may have thrown you off. Her left leg also has the strangest stair-step edge on it, too. I'm not sure what to make of that, but it looks suspiciously like someone trimmed it and failed to smooth the edge properly.
In the upper center of the photo are what look like lacy, blue panties. The woman there is wearing black ones, so it's not her. The fingers alongside the lacy blue thing also look out of place for that woman on the top edge, so it seems like there is a fourth woman there. What else would the lacy blue thing be? Part of a bra, possibly, but its not on any of the three women in the photo.
I see what you mean. I missed that the first time. Good eye!
Someone also has her hand on the hip (?), thigh (?) that goes with the blue lace, but the fingernails are showing, so it can't be the woman on the left because she would have to be inhumanly flexible to place her hand like that.
Additionally, there is something that has bare skin sticking out above the center woman's left shoulder, but it makes no sense for it to be part of the woman on the right because her legs are, supposedly, encased in long-legged black panties of some kind.
While this is a lovely picture, I am beginning to think that it has been Photoshopped/manipulated rather poorly in the final analysis. since the shoe that is added to the left leg draped over the center woman shows the same defects that I noted on the leg itself and the right panties-leg, I have to wonder if those legs belong to the upper-center woman, as I am going to refer to her, and she is not missing at all--we just can't see anything of her body above her crotch.
This photo might have been better served to title it differently and just leave it alone!