I admittedly don't watch "The Affair," but I'm guessing from the title that it's a bit of a spicy show (if it's not, that's a missed opportunity!).
It seems fitting, then, that the show's star Ruth Wilson hit the New York screening of the Showtime series wearing this sexy dress. It's by Gabriela Hearst, and despite the sleeves and midi length, the slit up the front allows for some serious side boob action. The green color is super flattering on Wilson, and she grounds the sheer layers with more substantial sandals in a blue color by Alexandre Birman. In a look like that, we could get into an affair with Wilson, too.
Update: This post originally reported that Wilson's dress was vintage. It was updated May 8 to reflect that the designer is Gabriela Hearst.