Dirk almost bothers correcting Emet. Technically, the Calliope abusing her Muse powers is the alt version, the one that effectively killed and cannibalised her brother, the one that Roxy left behind.

That said, there's really no benefit to explaining the lore about Cherubs to Hythlodaeus. It's not relevant.

Of course, at that point a whole gaggle of ragged cutieflies bumbles in, en queue and on cue.

Emet beats him to the punch, so he just raises an eyebrow, finishing off his slice of sfougato before any wayward bugs decide to land on it.