You and your parents walked into house of Uchiha family. Uchiha parents and your parents got arrangment for mirrage of you and Itachi. They all sat tl the table and then Uchiha father said

"Nice to meet you all,this it Itachi my oldest son. He is mute so he can talk only on sign language." my parents werent pleased with that and again their slefishness kicked but i stayed calm not changed by that fact then longhaired boy said to me

In sign "Hello,im Itachi and you are probably one for arragment mirrage"