The Mafia King's Bride is an IMPOSTOR

Here is a tight, Webnovel-style synopsis (~200 words) based on your first three chapters. It is written to hook readers quickly, emphasize betrayal and revenge, and push the identity twist, which is the strongest selling point of your story. --- Yvette Swan grew up believing she was the daughter of a powerful mafia family. But after the real heiress returned, everything changed. Once adored, she became nothing more than a tolerated mistake. Still, one person remained on her side. Her older brother Nathan. Until the night she woke up beside his corpse. Framed for his murder with the dagger her father had once gifted her, Yvette is dragged into the Swan family's torture chamber. Her father watches coldly as her nails are ripped out. Her fiancé kisses her sister while she screams. And the family she once loved condemns her to death without hesitation. Her last thought is a vow. If she ever gets another chance, she will make them all pay. But fate has other plans. Rescued from the brink of death, Yvette awakens in the mansion of the powerful Quinn family. Their missing daughter, Isabelle, has vanished without a trace. And Yvette looks exactly like her. With a new name, a new family, and a powerful fiancé waiting for a political marriage, Yvette sees her chance. The soft girl died in the torture chamber. Now she will rise as Isabelle Quinn. And when she returns, the Swans will learn exactly what kind of monster they created.