The Hunter by Elizabeth Fyre

In the middle of a dangerous revolution, a small settlement in Illinois manages to carve out their lives together in peace and happiness. Sara Watson, a trained dentist and daughter of the elected leader of the Barton Oakes Settlement, makes a motion to bring a dentistry to their community. Everyone agrees it would be a good idea—especially the resident bad boy, Oscar Mathis. He seconds her plan without a thought. Though their relationship was very unlikely, they hit it off with sparks flying.
Sara’s ready to take her relationship to the next level, and Oscar’s more than willing. Sara finds out that Oscar will go to extreme lengths to prove his ability to provide and claim her as his.