He Chose My Sister, I Chose My New Life as Heiress

At the altar, Lena refuses to marry Nathan and reveals the truth: while she faked amnesia, her fiancé and adoptive sister exposed their three-year affair—and her family helped cover it up. They think she is a helpless orphan with nowhere else to go. Then billionaire CEO Alex Hawthorne walks in with roses. Lena is not abandoned; she is the sole heir to the city's richest family, and this wedding is about to become their reckoning.