Koga President said, "This matter concerns the survival of the twenty-one Koga families, and our Koga Ninja Army has always been united, advancing and retreating together. Could you allow us to discuss this internally? We will definitely give you an answer by tomorrow morning."
Shiranui Mai also nodded, "Leave the head to me to handle. Since you, the manager, have spoken, let's make it into a wine cup."
So now it turned into a matter of mutual trust. If they left the head of Tokugawa Senhime with the other party, and if Koga turned hostile and offered the head and Li Pan to the Tokugawa, it would be the worst situation.
However, once the head was handed over, if they really did fall out, he could also bite back, claiming it was the Koga Clan and the Werewolves who assassinated the Tokugawa, and that he was simply unaware and just helping to deliver a package, with security camera footage as evidence.
