I love black on black since the different textures of each piece really stand out. Her coat and hat are by Rag & Bone. Love the leather waist coat detail. Layer a separate waist coat like this over your own for the same effect. The boots are Aldo. Her bag is old (she can't recall from where).
Check out the photo with her friend on the couples blog.
Get more black on black style inspiration on Pinterest.
Try this look: