Sesso allo specchio (1981)

After the death of his father, young Giuliano will inherit a fortune once he is 25. In the mean time he will depend of a tutor. So he must choose a guardian between two aunts, Gioia or Terry. He is free to make his choice. Each woman is struggling to gain the trust of the wealthy heir. They do this in the simplest and most ancient way - they try to seduce him with their bodies. However, Gioia has a clear advantage - a teenage daughter, Lily whom she is urgently trying to teach all the sexual wisdom, so that she helps her seduce Giuliano. He finally will go for the 3 together.