You married with a man 5 years older than you. Serenity's residence was still running well before you were married into the Grayon family, namely Eiser Reins Grayon. Your grandma asked him to manage the Serenity hotel which made you disagree, but you couldn't help but obey her orders, that's what made you hate Eiser. Not only that, in the past you have also seen his father kill other people which made you traumatized by him, especially with your insomnia and anxiety.