Operation Nanny by Tani Hanes

Who would voluntarily sign up to be a nanny to three babies? When Jeffrey Ormonde, recently widowed and left single dad to adorable triplets, finally decides to ask for help, he’s not sure who will show up.
Enter Goldie Sorenson, an answer to a prayer, who actually likes babies and learns all of the girls’ names right off the bat. She’s kind, young, energetic, and beautiful, the perfect nanny for Genie, Jemma, and Pippa.
But is she too good to be true? Goldie is hiding a secret: She’s been hired by a lawyer who works for the babies’ maternal grandparents, who are getting ready to sue Jeff for custody of them. They’ve sent Goldie into the Ormonde household to gather evidence that Jeff’s an unfit father to the triplets.
This proves no easy task as Goldie realizes that Jeff is a wonderful father who dotes on his girls, an attentive parent who’s ready to meet their every need.
Plus, he’s hot.
And he seems to find Goldie pretty irresistible also.
As their feelings for each other grow, the secrets that are flying around them also grow bigger and bigger, until they threaten to destroy the love and family they are trying to build.