foster sister

And no company had she but her foster-sister, and an old woman who had been her nurse.

In a few weeks my foster-sister was taken into the house, and placed under the tuition of my governess.

I returned home, to the house of my foster-sister, where I remained until my departure for Brittany.

In the baron's family she was treated somewhat like a second daughter, for she was Jeanne's foster-sister.