Original post here. Sourced on tumblr to mistressaeva-eroticaandmore via pandancer666.

This image appears to be a grayscale and a crop of work by Vitaliy Sokol. Something apparently closer to the original work (with signature not half-cropped out) can be found at Sokol’s Russian-language site under the title “Посвящается творчеству Бориса Вальехо” (“Dedicated to the work of Boris Vallejo”).