Being a Concubine Is Not Easy

My half-sister schemed to make me climb into the prince’s bed, causing me to become the concubine of the least favored prince, Prince Cheng. It was only after I married into the household that I realized—Prince Cheng was a fool, the princess consort was also foolish, and the entire residence was nearly overrun with spies from other princes. My vision went dark. How was I supposed to survive this mess?