The Siren (The General's Daughter #1)
Breanna Hayse

The 18 year old is appalled, but it does not take long for her to discover that love can be expressed in a firm and consistent manner upon her little bottom.
She meets Rich, a handsome and very dominant engineering officer, who quickly becomes part of the family's routine. For Sam, he's the perfect combination of her beloved Generals, and he steers her towards life as a submissive. Not only does he find himself frequently spanking his wayward girlfriend, but he gradually introduces her to the not-so-secret world of true D/S.
Love, laughter, duty and obedience frames Sam's life and, despite a constant sore backside, she couldn't be happier.