Since both girls were born the same day, and brought at the same time to the orphanage could fly be the dukes legitimate daughter. The possibility is still there it's like 50% maybe one was the daughter of a maid and they got swapped to protect the legitimate daughter? (Which in the end ended up working, if shes the true daughter.) It's still speculation and very far fetched but still could be possible
Since both girls were born the same day, and brought at the same time to the orphanage could fly be the dukes legitimate daughter. The possibility is still there it's like 50% maybe one was the daughter of a maid and they got swapped to protect the legitimate daughter? (Which in the end ended up working, if shes the true daughter.) It's still speculation and very far fetched but still could be possible