Over Kieran's Knee (New York Domestic Discipline #4)
Jenna L. Spring

Shy accountant Nicole needs a change in her staid life. When she enrolls herself in one-on-one boxing lessons, she doesn't expect to fall for her fierce, stern instructor. Kieran scares her. He intimidates her. Too bad he calls to the very marrow of her soul.
Kieran Murray put his boxing career behind him years ago, but he keeps up with the sport that made him wealthy by training those who can afford his fees. He isn't looking for a woman for more than one night. A bashful, petite sweetheart with soulful brown eyes and a kind smile? Definitely not for him. So why can't he get Nicole off his mind?