Elena Undone (2010) on Netflix

Peyton and Elena are, on the surface, diametrically opposed - one, a well-known lesbian writer, the other a mother and wife of a pastor - but when their paths cross, several times over, they feel compelled to connect. What begins as friendship quickly blossoms into something deeper. Peyton tries to extricate herself before her heart wants what it can't have. Elena can't imagine not having Peyton in her life. And despite the fact that she has never even considered kissing a woman, Elena is overwhelmed with a desire to do just that. Despite Peyton's reservations, Elena pushes the relationship into a full-blown affair. The two women fall deeply in love, both keenly aware a future together might be little more than a dream.