Puppy Love — Morgan K. Wyatt

Theo decides to give up on love when she catches her sister in bed with her husband. Instead of blaming her sister or her husband, she blames herself, divorces her husband, distances herself from her sister, and shuts her heart to love.
Her son inadvertently pushes her back into the dating game when he drops off his puppy, Ollie, as he heads out to deployment abroad. He fails to inform her that the puppy isn't even close to being trained or even somewhat obedient.
Ollie brings the dating-phobic Theo into contact with Westvale's hottest bachelor, Dr. Brent Knight. Despite her best friend Lorna's urging to go after him, Theo hangs back due the eleven year age gap and her past romantic history, but it doesn't stop Ollie from barreling ahead.