Half-Blood Princess Book One
22 parts Complete Matilda Lillian Snape is the twin you never knew existed. Tilly is Harry's younger sister by 15 minutes. She never connected with James, but when she met Severus Tobias Snape, she had an instant love for him. Even when James was alive, Tilly felt as though Severus was her father, not James. On that fateful night, both twins sustained the lightning-shaped scar from having survived the killing curse cast by the darkest wizard to grace their world. But Tilly follows a darker path compared to Harry. Having the Potions Master as your father, the Malfoy heir as your best friend, and Harry Potter as your twin, all while being the chosen one and the girl who lived, can come with difficulties.
Come along with Tilly as she finds her missing half, protects those she loves, falls for her best friend, and fights for the wizarding world. Also, see a side to Severus Snape that not many believed he had; a kind, caring, loving and protective side, for his daughter.