Between You and Me by Jennifer Gracen

As the only daughter of the wealthy Harrison clan, Tess Harrison has everything—except the baby she longs for. With no husband in sight, she escapes to her family’s retreat in Aspen, Colorado, visions of sperm donors dancing in her head. Instead, she finds Logan Carter. When the ruggedly handsome manager of the Harrison ski house offers to be her baby daddy in exchange for her playing his girlfriend, Tess is breathless to begin the charade. After all, the brokenhearted heiress knows better than to fall in love . . .

She would be Logan’s dream girl, if his dark past had left him with any dreams. Now the brooding bachelor’s only hope is to satisfy his mother’s dying wish to see him happily paired off—and give lovely Tess the baby she longs for. But when he and Tess opt to make a baby the old-fashioned way, he’s fighting hard against the longing to hold on to the elusive Harrison beauty forever . . .