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Not Kris Sign<<
In the PITW universe, most Packs we know of are of the "You raised it, you sit on it" persuasion: they wouldn't risk their own 'Packies' with some other Packs' problem. So that way, Sarah has a measure of safety, and her own pack doesn't think they
can kill her: she's too big and strong.
Since she's already run down the street starkers; and all people saw was a big Cougar, she has the safety of "Eyewitness usually don't see squat, even though they were there."
Mentally, Sarah is pretty much a pup or cub mind-wise, when she's all fuzzy and toothy, so there is less of a risk than would seem to be; provided she doesn't get
frightened.
And..if she were found out..nobody would be looking for normal sized Were's- they'd be looking for giants with enormous "personalities".
All the better for camouflage.

KMacK...
"You don't have to be invisible when everybody is looking the wrong way..."
Writing the series "Wulfen Blood"... getting ready for publication.