A little ant? This little ant just tried to kill you and more importantly your daughter. You should exterminate him and everyone close to him as soon, as possible.
if it was realy his cousin well then he is an idiot to the power of 20 on a scale of 1-10 he wasnt even on the target list with the mc being preoccupied with his daughter, woman, disciple, the doctor family, the gambling family, the wangs and himself he could have just flown under the radar...
now he is on the target list