No they’re not related, the grandfather lied so the evil dad of Rose couldn’t do anything. Probs what happened was evil dad got to the real Beth first and sent her to the organisation, the reason why both of them were teamed up was probs to make it easier to kill them both whenever. Grandfather didn’t care, he prob had low expectations that his granddaughter was alive so took the fake Beth for precautions. Cause how would evil dad prove she’s fake if the real ones in the organisation, he’d reveal himself if he tried. it’s either that or couldn’t tell which one was the real one so kept them both alive so his son could marry either one.

So is fake Beth (the Beth with sky blue eyes) related to Rose or not? Because fake Beth's father is their grandfather's son, no? Didn't the grandfather just adopt fake Beth bc her parents died? Not from like an adoption center or anything? Wouldn't that still mean she's related in some way orrrr????