Le due... grandi labbra(1984)

Two women enjoy homosexual intercourse at a trendy nightclub after closing time. One day, two rapists stalk the women and enter the establishment, threatening them with guns. The men rape the women, who are unable to resist. Alerted by the noise, the daughter of one of the women, who was in an upstairs room, enters the room, worried. She too, despite her mother's opposition, is raped by the two criminals. But in the end, the three women prevail and manage to free themselves of their tormentors, killing them with their own weapons.