No, but i read somewhere that her mother was the sister of the twin's mother. So basically they are cousins. I forgot if their mothers are twins or just sisters.
Oh ok tha KS that makes so much sense now
They're sisters
Basically the duke/lavienne dad's is her biological dad. She is the archduke's nephew/his sister-in-law's daughter. Also the twins' cousins.
Yup exactly
Is she his real daughter she resemble the mom way too much