Here let me grab my blue dress that I gave you in the attic. You will wear that because you need to look presentable for James.
You will wear my blue dress to see James.
Sophia appear with Florence at the top of the stair case. Tempting Florence to visit her sick cousin James even though she is forbidden to see him.
Sophia tells Florence that she will wear Sophia's blue dress that she had given her in the attic, therefore she will look presentable to visit James.
I chose this scene as significant because it is where Sophia, the dead cousin, convinces Florence you go meet her living cousin James. Florence is forbidden to meet James because he is sick but Sophia causes it to happen. This shows how Sophia is gonna change Florence.