The Sensuous Three (Red Hot In Bed) (1973)

While out on the town in Berlin, Raymond sees and falls for Harlis, a star of a troupe of lesbian cabaret strippers. Attracted to a man for the first time, Harlis leaves her long time girlfriend and dance partner. Overwhelmed by jealousy and anger, his brother (Peter) and his ex-fiancee (Ria) are determined to sabotage this budding romance.