Her mother

Do you have source and it is easy to correct!

Try this: http://www.fielmann-akademie.com/geschichten_02.php

I guess Cecilie meant some closer to a primary source or with a reference to a primary source. Web pages is mostly a copy of each other.

The web source for Cecilie's profile is
http://www.reventlow.dk/cgi-bin/igmget.cgi/n=reventlow?I1402 and the user submitted Notes on that profile tells the same, but links to the same page a you.

What is the primary sources for this?

In any case I support that we make the change and writes some notes on the profile about that, but the best is to come up with some primary or close to primary sources on this statement.