Good Guys Love Dogs (Second Chance) by Inglath Cooper

Desperate father Ian McKinley moves his delinquent teenage son to the small Virginia town of Keeling Creek, a place very unlike the New York City life he has been leading. Love takes him by surprise when he falls for Colby Williams, a woman unlike anyone he has ever been drawn to, a small town vet with a heart for animals and a fierce love for a teenage daughter she is also struggling to raise.But Colby has a secret in her past, a secret she's not sure her daughter will ever forgive her for. And as for Ian McKinley, he seems too good to be true. If she had learned anything from the one time she had thrown her heart fully into love, it was that it didn't last.