Summer of Secrets Series by Maureen Child

Surgeon Sam Lonergan lived a no-strings-attached life...until he met Maggie Collins, the young, sexy, housekeeper of his family's ranch. Their affair was hot, their secret rendezvous hotter. And after sharing incredible passion with Sam, Maggie discovered she was pregnant. Although Maggie was falling for the rich, reclusive doctor, she knew he was not the marrying kind. If Sam proposed out of obligation did she have the strength to hold out for more?

I can never forgive this despicable man…Maggie has been working as a housekeeper for wealthy Jeremiah Lonergan ever since he rescued her two years ago. One night, Maggie decides to skinny-dip in the lake outside of the huge Lonergan mansion. While swimming, she hears a sudden rustling in the trees. It’s a man brazenly watching her! Without shame, he introduces himself as Sam Lonergan. Maggie is finally face-to-face with Jeremiah’s grandson, the one who left him alone in the depths of despair!

Tired of going unnoticed by the boss she loved for years, Kara Sloan decided now was the time to pack her bags and quit. But just as she was about to storm away, Cooper Lonergan surprised her with a night of seduction. He couldn't let the one woman who organized his chaotic world slip through his fingers. Cooper's plan was to do anything to keep Kara in his life—including taking her to his bed. But this sudden change from all business to all pleasure wasn't without its share of consequences....

They hadn't touched since that night fifteen years before but Donna Barrett still recognized the desire in Jake Lonergan's eyes. And the guilt. For he'd sought to make her his when she'd been his cousin's girl. It had been their secret...until she fled town with a bigger one. Now, Jake was determined that Donna's son rightfully be given the Lonergan name—his honor demanded it. But it was passion that drove Jake to claim the woman he'd only tasted years before—claim her and brand her his own.