Well first of all to put an end to the speculations, there is a copyright tag in the picture. All I had to do was go to the owners website and check their list of models, et voilà they never worked with raven riley.
It's either a lookalike or a fake, while i would say the latter, just look at the weird fuzzyness of ger hair against the guys face and a missing shadow in his face of her head, while everything else has a big drop shadow to the right.
I rest my case.
If it is in fact a fake it's most peculiar, i mean, why fake a girl like raven riley having sex - when you can find the real thing all over the place.