I would karthik should stay away from Sathya prakash life , if he really concern for their happy life he should transfer Sathya to some other client office or he should move to his native place , problem will be moved.
He is doing a big mistake by inviting prakash to this party and surprised why Sathya has accepted it.So the gap between Sathya and prakash going to be increased surely if such sequence comes
I don't like blame neither karthik nor Sathya