When Isabel Hellidoro was being sent to Portugal, she had one thing in mind: eliminate her acolytes. The answer was one simple thing: Power. She got power by killing those who stood in her way. With the death of Isabel's acolytes, she would be the most representative member for The Turk, and later maybe even a member of the Turkish Board of Directors.
When a Templar named Xaviér de Margiot threw a lavish party, Isabel hired a young man to kill Josèphine and her associates. Josèphine was talking with co-worker de Villefort when she suddenly saw some movement at the rooftops. The slaver meant it was hallucinations, so they walked back in and collected a new bottle of wine: the glasses had been standing outside. As soon as the slaver and Josèphine drank, they both felt dizzy. The poison had been used on the glasses, and not in the drink itself.