Authentic Edo period original, c.1838, Japanese erotic art shunga woodblock print picture by Keisai EISEN (1790-1848).  From the shunga series, Shunshoku hana no shizuku (Erotic Drops of Flower Petals). 
 
Shunga picture measures 22.5 cm x 27 cm.  Very good colors and impressions, along with black lacquer.  Condition is good with some wear and soiling.  No backing.  Please see and judge from photos.
 
A nice original shunga woodblock print picture of a coy woman being penetrated by her lover.  This is a variant (different clothing colors and patterns, which is common in Edo Period shunga artwork) to the more deluxe version found here.