The baby made at christmas

Independent Lee knew she had a cushy life in Aspen.
A great job as a ski instructor, a luxury home (well, the caretaker's apartment, but it was right on the slopes). And a new fling with new coworker Mac Wheeler. He was handsome, athletic, sexy-the après-ski had just gotten a whole lot better!
Only it was never meant to get serious. She's pregnant. Mac's baby, conceived at Christmas. Overnight, her plans change: she's moving back East to work at the family hotel with her sisters.
But the real shock is...Mac has followed her. Yes, 1,700 miles, determined to be...what? Angry? Sure. Daddy? Guess so.
Husband...? Who knew...