In the Arabian Prince series:

V.1 - Sheikh no Yuuutsu
Kissing frogs was overrated. And practical-minded Penelope Doyle had yet to find one who didn't turn into a toad at the first lip lock. But when the worst of the bunch stole her heart and her seed money, she vowed she would never again pursue a fairy tale.

Even after she accepted a job in El Zafir and met her new boss, Rafiq Hassan, a truly splendid prince whose magnetism certainly made her want to believe in true love, in spite of the facts. Surely, a handsome sheik would never look twice at a plain American girl, no matter how smart or talented.

But then...he kissed her.

V.2 - Sheikh no Kodoku
ALWAYS BE HONEST
Desperate for a job, American beauty Crystal Rawlins would have done anything to become nanny to Sheik Fariq Hassan's children. And telling a little white lie about her looks to secure a dream job in an exotic location seemed like a very small detail. But then she met her boss, and saw the definition of tall, dark and...wow!

AND DO NOT BE BEAUTIFUL
Burned before, Sheik Fariq Hassan didn't trust attractive women. Fortunately, his new nanny was far from stunning. Still, he was captivated by her fiery spirit -- and by her passionate kisses. She obviously shared his attraction, so why did she keep pulling away from him? And what secrets was she hiding behind those glasses and bulky clothing...?

V.3 - Sheikh no Gosan
BEWARE TALL, DARK AND HANDSOME SHEIKS IN MOONLIT GARDENS...

Too late! Once Kamal Hassan drew her into his arms for a breathless kiss, Ali Matlock was already halfway to losing her heart. Though the sensual sheik was definitely the world's most irresistible bachelor, Ali wanted more than just the passionate affair he was offering!

Royal decree demanded that Kamal marry and produce an heir. And ever since that magical moment five months ago, he'd known Ali was everything he wanted in a woman -- and a wife. And if he wasn't careful, the alluring commoner from a faraway land could wring from his lips the three words he knew she longed to hear.

[From fictiondb]