Another "celebrity" sex tape is about to hit the market -- and this time, the people distributing the footage claim the star is Danielle Staub from "Real Housewives of New Jersey."


Hustler tells us it is all set to distribute a 75 minute tape, featuring Jersey's most hated Housewife -- and mother of two -- in a naked romp with a mystery man.

A rep from Hustler tells us the tape was shot last September -- several months after 47-year old Staub first appeared on the Bravo reality show.  The tape is set to be released on June 14.

A rep for Staub had no comment on the story.