by Jean Fouquet (France, 1420-1481)

A motif of Maria exposing her naked breasts to her infant son was frequently used before the Catholic Church turned ‘unfunny’ (after the council of Trent, 1563). Realistic images of women disguised as Mary with bare breasts are religious and erotic at the same time.
Beautiful Agnès Sorel was (likely) the model.

La vierge à l’enfant entourés d’anges (partie droite du diptyque de Melun)