Group portrait of the Asser-children in fancy dresses by Eduard Isaac Asser, 1856
On this photo I recognize children from these photographs by the same photographer: on the far right Anna Gratia Asser & Unknown Girl (which the website of the Rijksmuseum has labelled as being Anna Gratia Asser & Thérèse Asser, if you scroll down to the detailed description), and on top in the middle: portrait of a Girl in Tulle. The two children lying on the grass on the left are the same children as in this picture here, described on the Rijksmuseum website as being Thérèse Asser & unknown child. So one of the children is misidentified as being Thérèse Asser.
My guess is that the second girl from the right is not Thérèse Asser, but another girl of whom we do not know the name. She could be the daughter of Thérèse Asser’s cousin, daughter of Elisa Beer-Oppenheim, for they look very much alike. And the ballerina girl on top in the middle might be the other daughter of Elisa Beer-Oppenheim.
The real Thérèse Asser in the above group photo might be the girl (dressed as a boy) on the left, sitting in the grass, with her back to the other children.