Hi,
Sorry, but I'm about to throw a spanner in the works

I think the second photo is the young girl, Therese, but the third photo is the girl next to her, on the right (4th person along).
The lengths of the skirts and the clothing all point to that - in the second photo she is a bit younger, and if the third photo was of her, at a later age, the style of clothing I feel would be different.
I think the third photo is of a sister, which is why they look so alike.
Paulene

The group photo is lovely by the way

Was it taken in France?