“She loved him in silence. From the moment she could remember, Sophia Thomas had watched Daniel Harper - her older brother Nathan's golden-boy best friend - from afar. He was everything: charming, confident, kind. And to him? She was just "Nathan's little sister." At fifteen, she tried not to care. Tried not to notice how his smile lit up a room or how his laughter made her heart race. But when Daniel comes home from college and agrees to tutor her in math, Sophia realizes something painful: She never stopped loving him. As they spend more time together, buried feelings begin to surface - on both sides. What starts as stolen glances and quiet longing turns into late-night talks, shared secrets, and moments neither of them expected. But there are rules: - Don't fall for your brother's best friend. - Don't let him see you as anything more than family. - Don't believe he'll ever feel the same. Too late.”