Mara Jade is Luke's WIFE in the old Extended Universe that got thrown out when Disney took over. While much of the old EU is no loss, Mara Jade was AWESOME. If you ever get the chance to read Timothy Zahn's Star Wars trilogy (Heir to the Empire, Dark Force Rising, The Last Command) do so, they are EXCELLENT books and a master class on how to write so that both the heroes and the villains are pretty much always smart and never holding the idiot ball.