A masochistic family's wife

I think I quit my job five years ago and got into an arranged marriage with my husband, an up-and-coming novelist. Her husband is the son of a well-known wealthy family and lives an elegant life every day, but suddenly her stepmother dies and she has to take care of her remaining family. Despite her struggles, Kana fulfills her mission as a wife, but by chance she finds out the family's secrets. Every time I accept the troubles of a family that is struggling to tell anyone, the sadism that lurks inside Kana begins to ache...