Thought It Was ‘The End’, Only to Return to a Changed Genre (completed)

Adaline was reincarnated as the villainess in a novel. She meticulously avoided all death flags by faking her own death and ensuring the protagonists' happy ending before going into hiding. However, upon returning for her mother's funeral, she finds herself imprisoned by her childhood friend and former fiancé, the original male lead, who reveals he orchestrated her return to keep her forever.