Aside from the painted double portrait of Rembrandt as the Prodigal Son and Saskia as a whore (Dresden, Gemäldegalerie) - which can hardly be categorised as simple portraiture - this is the only image Rembrandt created as testimony to his marriage to Saskia.
'This etching with husband and wife is not a domestic scene, but an allusion to the significance of marriage to the artist and his art. Love as the nourishing source of artistic creativity is a common theme in literature of the 16th and 17th centuries - a theme encapsulated by the Dutch motto Liefde baart kunst (Love brings forth art). 17th century Dutch painters depicted this motto in family and double portraits, but this is a unique treatment of the subject in 17th century printmaking.'
(Rembrandt by himself, ed. Chistopher White and Quentin Buvelot, National Gallery, London, 1999, cat. 46, pp. 162).