Fascination (1979)

aka: El Castillo De Las Vampiras

This erotic horror film, set in 1916, tells the story of a thief who seeks refuge in a castle owned by two women, Eva (Brigitte Lahaie) and Elizabeth (Franca Mai). The women are seductive and teasing, but turn out to be part of a vampiric cult of blood drinking aristocrats. (In French language, with English subtitles).

This film comes from a very nice, slightly widescreen, uncut import print.