Martha Marcy May Marlene

Martha Marcy May Marlene is a 2011 American drama thriller film written and directed by Sean Durkin, and starring Elizabeth Olsen, John Hawkes, Sarah Paulson, and Hugh Dancy. The plot focuses on a young woman suffering from delusions and paranoia after returning to her family from an abusive cult in the Catskill Mountains. The film contains several references to the music of Jackson C. Frank.

In a flashback, Martha is seen meeting Patrick for the first time. He declares that she looks like a Marcy May. It is explained to Martha that the group is working toward being selfsufficient on their farm. Later, Martha awakens in the middle of being raped by Patrick, and afterward another woman assures her that she was lucky to have Patrick as her first sex partner. Later, he sings Jackson C. Franks song Marcys Song in front of the group, and now addresses Martha as Marcy May. The cult members are shown swimming naked together at a waterfall.At the lake house, Martha walks into Lucy and Teds room while they are having sex and gets into bed with them. A horrified Lucy explains that this is not normal behavior, and Ted is furious about the incident. Martha continues to struggle with the return to her old life. ........

Source: Wikipedia