Backdoor to Hollywood 7 (1989)

Sinopsis

Our plot begins with twin sisters who are linked psychical through sympathetic nerve endings. One, Kate, a quiet and proper girl the other, Karla, a steamy slut! When Karla has her girlfriends take advantage of Kate's boyfriend's desire for more passionate pleasure... the plot thickens. Kate explodes with lust and revenge when she then takes Karla's man and has him thrust his gleaming shaft deep within the firm grasp of her smouldering backdoor! Each stroke ignites two whirling tornados as his throbbing thunderbolt electrifies both sisters with it's penetrating white heat!