Responses
I honestly doubt it. Everyone's she's done so far has only been for herself. She's selfish. She canceled Selly's trip to the city, which would have allowed Selly to see a glimpse of life outside the estate, and has acted in a way that shows she doesn't care about any consequences that are incurred by her sister.

I’m really happy for the big sister, I just hope she’s is clever enough to understand that actions have consequences and she will propose her little sister to flee when she will escape. ╥﹏╥