No, she really is a nice person and we get along well. No trouble now, none expected ahead either.
Then you might say something like "That text you sent me turns out to be one of those Internet urban legends. Here's a link to Snopes.com that says it is not true: http://www.snopes.com/politics/crime/koch.asp."
Plus maybe something about how easy it is to be fooled by "Internet facts". She will probably be embarrassed that she sent the text to you.