Does anyone remember the name of a history that was on the forums about a sick kid whose dad paid him a tutor and a nurse that ended up catfighting?
I believe you are looking for "Good News/Bad News" by Catwriter, from December 2014.
Here is a link to the story on FCF:
https://www.freecatfights.com/forums/index.php?topic=44833.msg344204#msg344204