She was my best friend's little sister. Completely, utterly, off-limits. I promised to look out for her, to keep her safe. Not to notice the way she'd blossomed into a beautiful woman. Not to get hard every time her innocent eyes looked my way. The night she showed up at my penthouse, scared and alone, I knew I was in trouble. One look at her tears and I'd burn the whole world down to protect her. One taste of her lips and my control shattered. Our nights were filled with sinful temptation. Our days were a lie. I knew it couldn't last. I had secrets that could destroy us. But walking away from her? That's the one thing I could never do. Even if it cost me everything.