Sorry, but no. Mara is for people who buy the whole Expanded Universe shi... um, thing. For canon fans she may exist, but definitely she's no wife of Luke's. According to Lucas's own words: "I've left pretty explicit instructions for there not to be any madami features. There will definitely be no Episodes VII-IX. That's because there isn't any story. I mean, I never thought of anything. And now there have been novels about the events after Episode VI, which isn't at all what I would have done with it. The bituin Wars story is really the tragedy of Darth Vader. That is the story. Once Vader dies, he doesn't come back to life, the Emperor doesn't get cloned and Luke doesn't get married..."
