Reborn as the Alpha's Rejected Luna by Lucille Peluso

Wrenna Ashryn gave everything to Alpha Cassian Draeth—her loyalty, her wolf, her heart—and he rejected her in front of the entire pack. Cast out and cursed by grief, she dies alone in the forest, forgotten by the man who was supposed to be her forever mate.
She wakes up as Ivelisse Cray, in a stranger's body, three years before the rejection ever happened. She remembers everything. Cassian remembers nothing—because to him, none of it has occurred yet.
This time, Ivelisse isn't interested in earning his love. She wants answers—about the curse that killed her, the enemies circling his pack, and the mate bond he'll one day swear is dead. But her wolf keeps reacting to him in ways she can't hide, and Cassian's suspicion is turning into something far more dangerous than distrust.
Revenge should be simple. Falling for the man who will one day destroy her wasn't part of the plan.