A Werewolf's Hunger — Rachel E. Rice

Wilder, a lone Werewolf desires Adrienne as his mate, and he will do whatever he can to keep her from leaving him, because she is essential for the future of his pack. The only way to increase his family of wolves is for her to mate with his brothers.
Adrienne begins to accept the idea that she could live with Wilder and his brothers but there is only one problem, one of the brothers -- Lycell, is arrogant, exciting, handsome, narcissistic, rugged, sensuous, but they loathe each other.
The second book in the Insatiable series.