This Time, I Won't Be Your Luna

I married the ""retarded"" mate instead of my sister. I pitied him, and protected him from harm, hoping for a simple life together. However, he was actually the hidden Alpha son of a fallen Pack Alpha. His foolishness was a disguise. He slaughtered the pack eventually, and became our new Alpha King. ""A 'half-breed omega' was never worthy of being my Luna"", that was he told me, before he killed me himself. Moon Goddess gave me a second chance. I was reborn, back to the night before the substitution marriage.