Sentence:  WILLY: It doesn't have to stick: we just need to get a court order for now - to keep Crawford from pulling the plug! With all the brain-power here, I'm sure somebody can come up with a pretext or call in a favor. Then we can tie this up in court while we arrange a state-appointed conservatorship - so we can protect her while we fight him on - / NIKKI: What's the point, Willy? / WILLY: The point?! [Willy stares.] Because she's <WSD>drawn a line in the sand</WSD>. One he already crossed, without truly understanding... and now he's standing out there alone. 
Meaning of the word marked with <WSD> tags:  To lay down a challenge; to provide a test of commitment (often one which carries a high risk) to a cause.