After getting divorced, my sister-in-law moved into my house with her child. She became increasingly demanding, taking over the master bedroom and even using my expensive facial serum to rub her legs. Her son also freely snatched and destroyed my daughter's toys and books. My mother-in-law and husband constantly took my sister-in-law and her son’s side, accusing me of being petty. Seeing my family's double standards, I stopped arguing and fighting back directly. Instead, I pretended to give in while secretly making my own plans, ready to fight back in my own way and get the justice I deserved.