My third idea is based on two people (Sara and Chris) who cannot fall in love because of their religious views and their relationship is forbidden. Their families do everything they can to stop them seeing each other and emotionally punish them so they do not go behind their backs.
In the end, Sara cannot take the pain and kills herself, she leaves a note for Chris explaining her love and how she couldn't deal with it. Chris feels so guilty that he then takes his life along with his families.
