Seeming to think most seriously on the question, he started rubbing his chin with a hand and snapped his fingers.
"Bloody right you are, mate. Silly of me to forget that bit of information!" As they resumed their outlandish conversation, they were already happening upon the familiar portrait, to whom James chipperly gave the password. The Fat Lady just shook her head at his enthusiasm and opened up to allow them entrance.
As soon as he'd stepped foot back into the common room, a slight tug on his mood caught him by the back of the throat. They'd have to go back up and drop off the food. They'd have to face Remus and pretend like nothing happened on that trip. James steeled himself for the otherwise casual return to the common room, looking back toward Sirius and hoping he wouldn't be showing any signs of unease, himself.
Not likelyAfter how he reacted, there's no telling.