My Adopted Daughter Doesn't Know That My Voice Has Been Overheard by the Whole Family

My mother announced in the family group that she was bringing back an adopted daughter. The adopted daughter lied that she was an outstanding poor student recommended by a charity foundation. But what she didn't know was that my voice had been overheard by the whole family. When my adopted daughter tried every possible means to please my father, I muttered to the side: [If my father knew that she was the illegitimate daughter of my mother and her lover, he would be so angry that he would be hospitalized, right?