Married to My Racer Fiancé's Rival

My fiancé Marcus threw the race to win my stepsister a gown. He lost my mother's necklace to Cole Blackwood—his billionaire rival. Marcus then wanted me as his mistress while marrying Elena as his wife.He didn't know that. Three days later, I will marry Cole with my $100 million assets. Marcus begged me back. Too late. I already belonged to the champion.