Course if she is a Noble woman maybe she doesn't want to marry a dirty old Nord. Course if that is true then why is she willing to clean up after him at the tavern?
One part about Iman's (real name) story is that she said the Thalmor are after her. Tell me why, the Thalmor, would send Alik'r mercenaries after someone? The Alik'r hate the Thalmor do they not? Iman says that they are really assassin only after gold. Again, why would their leader say it would be good to get home when you agree to help him? If he was a roaming assassin looking for the next mark why would he care about home or anything like that? That sounds a lot more like someone who has been sent away from home on a mission and wants to finish it up so they can get back ... home.
Amazon Queen is right in saying there is no proof of either one's case. But in this situation, where if I am going to be the person to make the call, based on what I know I believe the Alik'r.