Les nuits brûlantes de Linda

The name of this movie is Les nuits brûlantes de Linda released in 1975-07-16 and it's main theme is A young woman is hired to care for an elderly man who lives on an island off the Greek coast. When she arrives there the man warns her that his daughters are evil and dangerous. The woman discovers that one of the daughters is a crazed nymphomaniac who pursues, and seduces, everyone in the house, including her crippled sister..