She was proud that her daughter had grown into a beautiful and wise young woman, but troubled by Zeus’s conditions. He stipulated that in order for Persephone to remain on the surface, she must still be as pure as the day she was taken.
And Persephone is not unhappy, she looks forward to her role as Goddess of the underworld. Conscientiously greeting the new arrivals and helping them to settle in to their new, second lives.
With thanks to Boye Jervil