I doubt they know, or care, if the texture existed in the original game files. They are just covering their asses because they have a popular game with female characters in it, which these days is a magnet for politicians and lawyers. Isn't it funny that games today have to pretend sex doesn't exist, while on the TV ads Lara is seductively telling you shes waiting?
In most RPGs sex is used to add character and humor to the game, and even though they never have anything explicit on screen, nobody will dare put those kinds of things in games anymore. Think of Baldurs Gate 2 with no relationship paths, Fallout without a pornstar trait... but, blowing someones brains all over the wall, perfectly OK!