Leo and Splinter in “Unfinished Business”

Master Splinter, I tried to tell Karai that you're her father. I thought that if she knew, she would come over to our side.

There is a saying: He who runs his mouth gets a face full of nintako.

They say that in Japan?

They would if you were there. Still, your heart is in the right place. Perhaps it is time she knew the truth.

Maybe you should tell the other guys, sensei.