For Love or Duty — Bethanne Strasser

From Book 1: When Duty Calls Alyson Sanders' sister to deployment overseas, Alyson takes on the responsibility of her one-year-old niece. When the mother is killed in action and her personal effects include a letter naming Lt. Col. Mitchlen as the father, Alyson must decide whether or not to contact the man to let him know he's a father.
At first, Dale doesn't believe that Katie Ann is his daughter -- until he sees her picture. Not wanting her childhood to be as chaotic as his own, he shows up on Alyson's doorstep to see his daughter and to let Alyson know that he is seeking custody, pending the results of a DNA test.
Neither wants a court battle, but both have strong reasons for refusing to give up custody and it doesn't help when the little girl becomes attached to the big man with the deep, rumbling voice.
Tensions run high as they're drawn together, but a child's future hangs in the balance and neither wants to make a mistake by following their heart.
Duty Calls is the first in a three-book series that will be released, one per week, in Sept 2011.