This is one of those over the top allegorical paintings where her son is portrayed as Cupid. The Countess appears to be wearing a chemise and a wrap.
Keywords: 1712, de Troy, Anna Constantia von Brockdorff, von Brockdorff family, Cosel family, Wettin family, Countess, German, mistress, Augustus the Strong of Saxony, long high straight coiffure, hair jewelry, sweetheart neckline, chemise, waist band, natural waistline, wrap, elbow length sleeves, lining