Phoebe has always been the quiet good girl who followed the rules. Until one night she poured every filthy fantasy she had about the school’s golden boy, Conrad, into a handwritten letter. That letter was never meant to be read by anyone. But it fell into the hands of the one person who should never have seen it—Seth Astor. Her new stepbrother. Now Seth holds her most dangerous secret, and he’s not giving it back. Not unless Phoebe agrees to become his personal assistant for two months. Total obedience. No questions. No escape. What starts as blackmail slowly turns into something far more dangerous—forbidden desire, burning tension, and a game neither of them can stop playing.