Very nicely done. Sometimes mixing a sharp, modern image with sepia does not work well. In this case, I think it works very nice indeed. It adds a nice old-time, old-world feel. The only thing that looks out of place, seriously, are her under pants. They are a bit too modern to go with the other furnishings. I don't have an easy solution/suggestion either. "Bloomers" are definitely not the answer. Something in between. I suggest letting the ladies handle this one.
I considered that option as part of the critique and then thought: understandable, but no: too "in your face." The balance of the image would have been off with clothing topside but not below decks. I think you have two images at work here: one with appropriate duds and one "as is."