Arkain can tell Lucus is nervous about Kyoma being in the mail room. He can't clearly hear what Kyoma is saying but the way Lucus is acting Kyoma must be wondering why his belly is so big. Should he do something to let Kyoma someone is inside Lucus' belly. It could back fire but it might also get him out of this cramped belly. He pokes and nudges Lucus' belly, he even pushes his hand against belly hoping Kyoma will see it.