When Satoru first hears the expletive tumble from his kid's mouth, he stops what he's doing and stares. He blinks once, twice, and soon pats his kid's head. A wide grin grows on his lips, and he looks almost... proud? It kinda reminds him of himself when he was younger.

Then Satoru realizes that you're within earshot, and he knows he's the reason for this. That's when he sneakily whispers, "You can't say that word, 'kay?"

Your child has a confused look on their face as they stare at Satoru. "Why not, papa?"