Catch a Falling Star by Allyson James
Lea crash-lands her shot-up scout ship on Pamaar-a planet that shouldn't be there. She finds an exotic world with no technology, ruled by a gorgeous man with white-blond hair, dark eyes and a beautiful tattoo of a lion across his back.
Thane is fascinated by the lady who fell from the sky, sure she's part of the prophecy that will restore his power and heal his people. His lover, the warrior Deon, is more cautious, but he likewise feels a sexual pull to Lea and her unusual green eyes.
Lea finds herself quickly drawn to two men who are very much in love with each other, surprised when they assume she'll form a threesome with them. She faces a difficult choice-if she finds out what's wrong with the protective shield around Pamaar and restores it, she'll be stranded there forever. But if she escapes, she'll leave Thane and Deon, the two men she's coming to love, to certain death.