After Marrying the Scumbag Who Killed My Sister, I Gave Birth to Three Children

My sister died. On a snowy and rainy day, she lay on her back in the snow with a big belly, slowly losing all warmth. Her parents cried until they became dumb and their eyes turned red. She decided to join the family as a concubine to avenge her sister. There are eighteen concubines in the house, and the water is in turmoil. She will definitely find out the culprit who killed her sister, and she will not let go of any of the accomplices.