The Alcove is a 1984 Italy erotic film by Joe D’Amato
The BBFC cut the 1995 Jezebel video and 2001 Nouveaux video by 1:45s.
Perhaps the cuts were to do with the old stag film mentioned in the review
See review from IMDb: Surprisingly well-crafted
An English soldier (Cliver) returns home from the Zulu war with the daughter of a tribal king (Gemser) as his slave (a gift that he was given for saving the kings life). Not at all pleased with being a slave, the Ebony princess plots her revenge starting with the seduction of the mistress. Jealousy spreads like wildfire and before you know it, she has turned the household into a lustful frenzy of sex and hatred.
I can’t give away too much more or it would ruin the story, but there are plenty of little twists along the way. Speaking of twists, this film is actually far more twisted than it sounds. One of the more disturbing moments being a sequence about the filming of an inquisition-themed porno that turns into the sadistic rape of a lesbian / virgin by the filthy and none too bright gardener.
Sporting tons of full-frontal nudity, simulated lesbian and straight sex and some hard-core (as seen in an old stag film), this has the sleazy goods to go along with the D.H. Lawrence-ish setting and atmosphere, and is definitely recommended for fans of such.