Her Miracle Cowboy by Janalyn Knight

Acacia has cared for her quadriplegic, cognitively impaired twin brother for two long years. Hope arrives in the form of Noah, the rocking-hot new cowboy physical therapist. Dumped by her former fiancé when her brother came back injured from Afghanistan, it takes several months for her to realize that Noah is the real deal. That is, until her second date with him.
With Noah’s goodnight kiss comes a terrible shock. Heartbroken, Acacia shuts the handsome cowboy out of her life.
But life is about to throw her a curve ball. Can she face the crisis and still care for Bobby alone? Or will she have to swallow her pride and call on Noah, the closest thing she has to a friend in San Antonio?