To save her seriously ill younger brother, Xu Ruoyuan sells herself to the Duke's household. The Duchess uses her brother to force her to take a drug that can only be cured by sleeping with someone, then sends her to the heir, Gu Qianyi...
Xu Ruoyuan cannot understand why the Duke's household chose her in particular, until, on the day she goes to pay her respects, she sees Gu Qianyi's sister-in-law and realizes they look rather alike. That's when she understands: she's been made a substitute.
Xu Ruoyuan only wants to stay safe amid the struggle between the heir and the Duchess, and keep her younger brother out of harm's way.
She never forgets her place and dares not overstep, yet she finds that the usually cold-hearted heir is coming to her room more and more often.
After she rescues her brother and regains her freedom, she plans to leave, only for Gu Qianyi to block her against the wall. “You haven't yet given this heir a little heir of his own. Where do you think you're going?”
Not bad, I like this plot line
I'm a fan of this book.