Stigma (1982)

A young couple (Antonis Kafetzopoulos and Olia Lazaridou) have a baby affected with the Down Syndrome. In order to avoid the difficulties entailed in bringing a child that will never live a normal life, they decided to put an end to its life. That is illegal and the doctors don't take such a responsibility. Eventually, the couple with the aid of the girl's mother (Ntina Konsta) will feed the baby with water instead of milk, until it dies. Their deed will not be noticed but their relationship will never be the same. Finally they will be divorced.