Beyond the hurt of a dumb misunderstanding from moments ago, it's so much easier now to tell Tidus is just teasing. There's no offense taken at it whatsoever, instead Inigo just ducks his lead slightly as he lets out a light laugh - both at Tidus's words, and then at Kitty's fake scolding. (And also just at the sandwich-group-hug. It's nice. This is exactly the kind of thing Inigo loves.)

"Ahh, let's be careful! Kitty is going to kick our butts when she gets mad!"