Forced to Marry; Reborn, Exposed Sister's Succubus System

On my twentieth birthday, my parents came clean: they were bankrupt, buried under millions in loan-shark debt. The two of them knelt in front of my sister and me and laid out a bet. "You're both of marrying age. Whoever settles a marriage first won't have to marry Mr. Finch to clear the debt." I've been striking to look at since I was a girl, and even I hesitated. My plain-looking sister, though, agreed on the spot. Seeing the reluctance on my face, my parents coaxed and cajoled. "You're the pretty one. This bet's already tilted in your favor. Even your sister isn't objecting, so what are you hesitating for?" My sister lashed out at me too, calling me cold-blooded. "I don't have an ungrateful sister like you!"