The Bound Wives Club 4

Three bored husbands, one understanding: once a month one of them would tie and blindfold his wife while one of the other two has his way with her. Once one of the wives finds out, though, she wants to indulge her bi-curious tendencies and things start to go sideways. It's time for them to come clean with the wives once and for all, but not before they go out with a bang!