Father and daughter and the light from a window

At the Window, by Martin Drolling, date unknown.

The model - who is making a tracing using the light from the window - is the artist's daughter, Louise-Adéone Drolling (1797–1834), also known as Madame Joubert, who was a successful artist in her own right.  Only a few years later, she painted a very similar painting, in a very similar - the same? - setting.

Interior with Young Woman Tracing a Flower, by Louise-Adéone Drolling, by circa 1820-22.