Is My Little Poisonous Concubine Rebelling? That's an Act of Justice

In my previous life, I cut my flesh, drank my blood, and was a scumbag who deceived me about my feelings. In this life, I will marry your uncle, call me my sister-in-law, and take away your kingdom and collect some interest. Isn't it too much? It's a fun story about rebirth and revenge. It's a bit sadistic, but it's just a bit sadistic!