My Step-Brother Is A Vampire by RAVEN HARTLEY

"Your mother doesn't need to know about this." His fingers traced the curve of her jawline, his touch sending electricity through her entire body. "Every time I'm near you, I feel it burning—the hunger for you." Isabella's breath caught as he cornered her against the wall, his eyes darkening to crimson. "We shouldn't," she whispered, but her hands reached for him anyway. "Tell me to stop," he murmured against her ear, "and I will." Isabella's life becomes dangerously complicated when her mother marries a wealthy businessman who harbors an ancient secret—he's a vampire. But it's his brother, the brooding and magnetic Lucian, who threatens to unravel everything she thought was real. From their first charged encounter, an undeniable pull draws them together, igniting a passion neither can deny or control. As Lucian battles centuries of loneliness and she fights against surrendering to the darkness within him, Isabella discovers she's become his obsession. Caught between familial loyalty and primal desire, she must decide if their forbidden connection is worth the dangerous consequences—or if loving him will cost her everything.