Under His Protection by Doris O’Connor

Jacqui Page is all set to spend her thirty-fifth birthday eating her body weight in chocolate and watching chick flicks—until her best friend drags her off to visit the local BDSM club.
Now, a birthday spanking sounds like a mighty fine idea. Especially if it’s going to be delivered by the one man she’s been secretively lusting after for weeks—her melt your panties in an instant, bad boy neighbor.

Lukas Markz can’t believe his eyes when his shy, goody-two-shoes, next-door neighbor turns up at his club, dressed as every Dom’s wet dream. He doesn’t do commitment, but witnessing her submission brings out his inner caveman. No other man is going to get to mark her soft skin or listen to the sounds of her surrender. This bundle of curves is under his protection, and he will show her what it means to be his.