Jacob Nieweg was a dominee who changed his vocation to that of painter. He made a portrait of Charley Toorop, while she is working on the painting of them. [http://leendertreudlertalsma.blogspot.nl/2017/02/]
Toorop painted this couple, the pastor / painter Jakob Nieweg and his wife Neine in 1927, on the occasion of Jacob's 50th birthday. The Amersfoort studio of Nieweg, who in 1914 stopped his work as a preacher to devote himself entirely to painting, was a meeting place for many artists. Charley Toorop also came regularly. They got along so well with each other that Toorop stayed with the Nieweg family for a few weeks in 1927, when she was overwrought. Toorop gave this double portrait as a birthday present to Jakob Nieweg.
[Google translation of text at https://www.trouw.nl/home/verwervingsinformatie-langdurig-bruikleen-uit-de-collectie-kamerbeek-depotnummer-11-448~a16349be/]