Commentary Inf XXXIII 9

Both Francesca ([Inf V 126]) and Ugolino weep and speak simultaneously, each of them in imitation of Aeneas's imagined hardened soldier, who would have to speak through tears if he had the fall of Troy to narrate (Aen. II.6-8). And both Francesca and Ugolino are accompanied by a companion who does not speak in Dante's presence.