This has been discussed many times on this forum, lol, those photos from photographer Tanya Chalkin do NOT feature Yulia and Lena, there are other pictures from the same shoot where the girls are facing the camera and you can see that they don't even look like them.
Clues to tell it's not Yulia and Lena (in the Kiss picture)
for "Lena": skin is too dark, hair is not right, face doesn't match
for "Yulia": too much junk in the trunk, too tall
And it's obvious when you look at this:
Tanya Chalkin - Girls (facing camera)