Sister's Vengeance

I saved an incredibly handsome young man.
After keeping him by my side for a few years, I grew fonder of him with each passing day, coaxing him to elope with me.
But just before our departure, I suddenly realized he and I were the main character and the evil female supporting character in this book.
I could only follow the plot, constantly humiliating and tormenting him.
When he was battered and broken, he met the redemptive female lead.
Years later when we met again, he had become the all-powerful Commander of the Guard.
He held my entire family's lives in his hands.
In the prison, he gripped my chin, forcing me to look at the mottled, jagged whip marks on his body.
'Sister, you owe me, and you'll pay it all back bit by bit.'
I picked up the blood-stained whip from the table, trembling as I handed it to him.
'Pay it back now, but please, be gentle.'