Undeniably yours - Shannon Stacey

Goodreads 3.87

One-night stand + two percent condom failure rate = happily ever after? 

Bar owner Kevin Kowalski is used to women throwing their phone numbers at him, but lately he's more interested in finding a woman to settle down with. A woman like Beth Hansen. If only their first meeting hadn't gone so badly...

Beth's tending bar at a wedding when she comes face-to-face with a tuxedo-clad man she never thought she'd see again. She tries to keep her distance from Kevin but, by last call, she can't say no to his too-blue eyes or the invitation back to his room. Then she slips out before breakfast without leaving a note and, despite their precautions, she's pregnant.

Kevin quickly warms to the idea of being a dad and to seeing where things go with Beth. After all, he's not the player she thinks he is. But she's not ready for a relationship and, given his reputation, it's going to take a lot to convince her to go on a second date with the father of her child...