How far can a friendship go before too far becomes too close?

Overview

Anne, a Parisian, visits her friend Yola in Tel Aviv, where Yola lives with her husband Avi and their son. There's tension in the air and the attraction between the two women is palpable. Flash back five years to their meeting, on a train to Jerusalem. Yola invites Anne to stay at her hotel, and over the next five days, their friendship builds from talk about their lives to an explosive menage a trois when Avi joins them on fourth day. Back in the present, can Yola have both Avi and Anne, or are the women futilely chasing rainbows?