Twin Sister STOLE My Billionaire Fiance

Violet and Viola, identical twins, were separated at the age of five due to a disagreement between their parents. Years later, they reunited but the selfish streak in Viola makes her want to take everything Violet, her gentle older sister had, including her fiance....
How is Damien supposed to be able to tell them apart or was he attracted to the both of them?
In this war between sisters, who will eventually win?