The princess accepts the challenge. The second tiger comes out and kills the princess lover.
From that moment on no one ever questioned the king’s justice system as it had been done that day.
I'm so sad
The princess ended up marrying and did become Queen upon the death of her father. Never forgetting the fact that the tiger noticed the innocence in her first love, one of the very first things she did as the Queen was change the justice system to one that is more fair for people accused of crimes.