"Io non sono un infante," he replied acidly. As soon as he had been laid on the bed, he summoned a pigeon and sent the startled bird at Gokudera's face, continuing, "You cannot keep me in your apartment. Let me go and I won't mention a word of this to Tsunayoshi."

Because he doubted that Tsuna would condone one of his Guardians keeping another Guardian in these circumstances. Gokudera had to be doing this in secret, though what excuse he'd given to the Vongola Mukuro was very interested to know.