Alimony in Colorado?

My ex-wife and I want a divorce. We've been seperated for a year and a half. She's been in Colorado and I've been in Texas. She's moved to TN about 2 months ago and I'm about to move there next month. She says that she's filing the divorce in Colorado and that she wants back alimony for 1 year. Well, before she left, we were only married for two and a half years. PLUS...she was living with her boyfriend for all but three months of our seperation. Is she entitled to alimony???