Appa would have killed him for sure if they were not getting married in three weeks
He showed some restraint as the wedding is less than a month away... and HE had given his word to Vandita that he wont act up coz if he does she has threatened to host all the events including the wedding...
IF R&B and II were not engaged Appa would have shown him some Iyer temper
R&B is way too msug for Appa he doesnt rile Appa but does whatever he wants anyway... he has no respect for Appa other than the fact that he is II's Dad... vice versa for Appa too, he doesnt care for this man except for the fact that II "seems to" love him so much
He will do the needful with his daughter how ever best he can...