Soon-Yi Previn is not Woody Allen’s step daughter or adoptive daughter.
But Soon-Yi is the adoptive half-sister to three of Woody’s adopted children, is she not?
Top 10 misconceptions, followed by response in italics:
http://www.classicalite.com/articles/5654/20140131/fact-check-woody-allens-rape-case-gets-murky-as-mia-farrow-and-dylan-malone-lay-questionable-claim.htm
Soon-Yi was the adopted daughter of Mia Farrow and André Previn. Her full name was Soon-Yi Farrow Previn.