The Villainess's Path to Becoming a God Through Quick Transmigration

Mu Jiuli died, was chosen by the System, and began her quick transmigration journey. First world: She transmigrates into the body of a villainous supporting character whose parents don't love her. The original owner does all kinds of reckless things to win the male lead's heart, so Mu Jiuli swears to cherish her life and stay away from him. And then... “Wifey, let's get married!” “Wifey, from now on, you're all I see and all I care about. I'd give you my life!” Mu Jiuli is at a loss. Is this male lead for real or an impostor? Could someone have switched him with another guy?