My Adopted Sister is my Mate

From the back cover

"And the night we met again," I whisper, "my wolf recognized you." Silence. "Recognized me how?" she asks carefully. My chest burns even as my pulse thunders in my ears. "As my mate." The word falls between us like shattered glass. Avara laughs. "That's not funny." "I know." "You're my brother." "I know." I find myself inching closer... closer. "Thats impossible. This is sick." "I know," I say again, voice breaking now. "I fought it. Gods, I fought it. I tried to convince myself my instincts were wrong, that my wolf was broken, that I was losing my mind." Her hands shake. "Stop." "I can't," I say hoarsely. "Because every second I'm near you, it gets worse. Because my wolf wants to kneel at your feet and tear the world apart to protect you."

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Fifteen years after vanishing from the Silvermoon pack, Kaeden Vane returns, older, lethal, and right on time at thirty-three, the age decreed by the Moon Goddess for succession, having spent years years amassing forbidden knowledge, mastering dangerous magic, and preparing to destroy his father, the man who murdered his mother in a bid for godhood. His return reunites him with Avara Vane, his seemingly fragile, human adopted sister that Silas, their father, adopted as an 'act of mercy'. She is a Nyxarel, whose parents were slaughtered by the man she calls father and who has been conveniently placed and subdued by his father, until it is the right time to use her blood to attain immortality. And one touch is all it takes for Kaeden's wolf to recognize her as his mate, an impossible, unforgivable bond...