So, the MC is a teenager, who is also the new head of the family and crime boss, he was just at war with another crime family, and won.
Now they meet at the table to discuss the matter.
After completing, the other boss asks "Are we even now?".
The MC replies"not yet, which one of you beat my mother?"
The mother of the MC got badly hurt in the war, but survived, thanks to the magic powers of the MC (there are many mages, especially in crime families).
A bald one steps forward and confesses that he was the one. MC reads his mind telepathically.
Then he sets him on fire (amaterasu-like). And the brother of the dying one screams and attacks my MC.
But my MC easily pushes him telekinetically on the wall.
After there is only ashes of the bald one, my MC goes to the brother and tells him.
"I knew that it was you who hurt my mother, but I accepted the offer of sacrifice of your brother, to save your life.
Now its up to you, will you hunt me forever for what I just did, or will you take this chance your brother gave you to make something better of your life"
With the brother still stuck on the wall, the MC says to the other boss "Now we are even".