What a last name! The children are named Ugoline and Ugolin. She was maîtresse-en-titre of Louis XVIII. Her Wikipedia article is here.
Countess Zoe wears a transitional dress with a waistline between bust and waist and puffed sleeves as parts of a constructed dress.
Keywords: 1825, Gérard, Countess, French, mistress, Louis XVIII, curly coiffure, bandeau, vee neckline, pleated bodice, quarter length puffed sleeves, cuffs, belt, natural high waistline, A-line skirt, necklace, bracelets, gloves, wrap