Reborn to Marry the Captain

My parents favored my sister. In my past life, they married her into a military officer's family, while I was married off to a struggling Educated Youth. The officer died, leaving my sister a widow. The Educated Youth I married turned out to be the long-lost son of a wealthy merchant. I lived without worry. My biased parents were furious and stabbed me to death. I was reborn along with my parents, back to the day they were to marry my sister and me off.