Curiously, the father, King Cecrops, was half-man, half-serpent (or half-fish), and a key figure of legend, since he not only founded Athens, but invented marriage, instituted the worship of Zeus, and brought reading, writing, and ceremonial burial among other basic cultural elements to his people.
The three daughters re-appear a bit later, in the story about Hermes coming to pay court to Herse, only to be extorted by, you guessed it, Aglauros, who demands a large sum of gold in return for acquiescing to the god's desire for her sister. This leads to Ovid's portrait of Envy, or Invidia, which became the reference and touchstone for authors ever after:
There saw she Envie sit within fast gnawing on the flesh
Of Snakes and Todes, the filthie foode that keepes hir vices fresh.
It lothde hir to beholde the sight. Anon the Elfe arose
And left the gnawed Adders flesh, and slouthfully she goes
With lumpish laysure like a Snayle, and when she saw the face
Of Pallas and hir faire attire adournde with heavenly grace,
She gave a sigh, a sorie sigh, from bottome of hir heart.
Hir lippes were pale, hir cheekes were wan, and all hir face was swart:
Hir bodie leane as any Rake. She looked eke askew.
Hir teeth were furde with filth and drosse, hir gums were waryish blew.
The working of hir festered gall had made hir stomacke greene.
And all bevenimde was hir tongue. No sleepe hir eyes had seene.
Continuall Carke and cankred care did keepe hir waking still:
Of laughter (save at others harmes) the Helhound can no skill.
It is against hir will that men have any good successe,
And if they have, she frettes and fumes within hir minde no lesse
Than if hir selfe had taken harme. (Golding)
We last encountered Aglauros and her life blighted by Envy in Purgatorio 14. By the way, both her sisters' names mean "dew," but I can't find a convincing meaning for "Aglauros" - suggestions gratefully accepted.