Russ Meyer's Vixen (1968)
 
http://www.imagengratis.org/images/russmeyers.jpg 
http://www.imdb.com/title/tt0063787/

Studio  Rosomania Collection
Release Date  October 22, 1968
Category  Classic, Softcore Sex Film
Director  Russ Meyer
Starring   Erica Gavin, Garth Pillsbury, Harrison Page, Jon Evans, Vincene Wallace, Robert Aiken, Michael Donovan O'Donnell, Peter Carpenter, John Furlong, Jackie Illman 

Vixen lives in a Canadian mountain resort with her naive pilot husband. While he's away flying in tourists, she gets it on with practically everybody including a husband and his wife, and even her biker brother. She is openly racist, and she makes it clear that she won't do the wild thing with her brother's biker friend, who is black