L'immoralità (1978)

Federico is a child-killer running from the law. Wounded, he is taken in by an 11 year old girl named Simona. Their strange love affair is interrupted by Simona's depressed, oversexed mother Vera, who concocts a plan with Federico to kill her wheelchair-bound, reclusive husband. Simona does not take kindly to this new relationship between Federico and Vera.