Yes, Brokeback mountain came to mind when I was thinking about these two. Of course not in exactly the same sense. It is unrequited cinta on John's part. It is a friendship on both parts.
Claire returns to Lallybroch with Jamie, where she does not receive quite the reception she was expecting. Unbeknownst to her, Jamie's made some choices in their time apart which come back to haunt them with a vengeance.