Suzanne Brockmann 
Undercover Princess [EPUB ebook] 

"THE NAME’S WIND, KATHY WIND…."With those words, Princess Katherine Wyndham went from sensible sister to secret agent. Her mission: to locate her brother-the long-lost crown prince. Her cover: nanny for handsome tycoon Trey Sutherland. Caring for Trey’s kids came more naturally than any royal duty.And falling for the brooding widower was effortless. But Katherine had always been the plain-Jane princess. Was it too much to hope that he could want a happily-ever-after with her…especially once he discovered who she really was?