Spoilers

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When Winfried tries to propose to Griselda, Griselda rejects him (i think), and it's revealed that Winfried is not a son of Duke Valdemar. Apparently, he was switched at birth? Dude's a child of some maid and was supposed to be killed by his mother. Griselda saved his life, but then she switched Winfried with the real third child of Duke Valdemar. Not sure what she did to the real son after.

Oh i see.
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I saw the scene in raw where greiselda tries to strangle the kid. Not sure if she actually kills the him. Also a man is burnt alive which i assume was greiselda's husband.