Inherited: One Nanny

NANNY WANTED
To my heir, Beau Prescott, I leave my Sydney estate and place into his good care my dedicated staff: housekeeper, gardener and nanny.
Nanny? Beau Prescott was highly suspicious of this interloper in the family home. A fit man until his sudden death, what did his grandfather need with a nanny? Maybe he'd taken her in out of pity—Margaret Stowe did sound as if she'd be the starchy, spinster sort.
But the vision that greeted him on his arrival home called out to every male hormone Beau had. Margaret Stowe was a stunningly beautiful young woman. Just what situation had he inherited?