There have been a few articles in the Italian and Belgian media over the past few days linking Hereditary Grand Duchess Stéphanie to an investment firm called "Kepha Invest" - whether this actually is much of a story in relation to her, see for yourself. More media outlets are actually not bringing up her name as she doesn't really seem to have anything to do with the story per se.
To cut a long story short: The Hereditary Grand Duchess apparently worked for an investment firm called "Kepha Invest", or at least represented them on two occasions in 2010 and 2011 at the palais d'Egmont in Brussels. "Kepha Invest" is related to a charitable foundation called "Kepha" which found many of its donors in Belgium and France - many of them elderly, Catholic and noble. People working for Kepha Invest and the charitable foundation Kepha are now accused to have committed fraud and laundered money.
An Argentine priest by the name of Patrizio Benvenuti, who was arrested earlier this week, is now claiming he is just the scapegoat of the case as he didn't say anything about the scam as to protect both the Vatican and members of the Gotha. One of the managers of Kepha Invest was Baron Christophe de Fierlant Dormer, who told a few months ago that he was the one who was deceived by Monsignore Benvenuti and his assistent Christian Ventisette. Who was responsible for the scam remains to be seen. Important to note in relation to the Hereditary Grand Duchess is that she had no knowledge of what happened and that she was one of the people deceived, as noted by the various media. More on the story at The Guardian, Reppublica, and DH.