15 Lessons Movies Can Teach Us About Cheating

Lesson: Affairs can upend your life in ways you won't predict.

This drama captures one of the scariest parts of falling in love: when you aren't sure if the object of your affection reciprocates your feelings. When it's finally obvious that Carol (Cate Blanchett) and Therese's (Rooney Mara) relationship is something more, Carol decides to leave her husband — who later argues that her same-sex relationship makes her unfit to be a mother.