My toxic parents threw a $2,500 party and bought a Cartier diamond collar for my sister’s dog. Meanwhile, my daughter received a slice of leftover cake for her 8th birthday. “Mommy, am I worse than a dog?” she sobbed. In that exact second, my mercy for my family died. “No, baby. You did nothing wrong,” I whispered. “But they just made a fatal mistake.” They treated my child like trash, forgetting who secretly bankrolls their lavish lifestyle. What I did the next morning, they never saw coming…