Kathy got up and took the cup that the servant brought along with the pitcher of fruit wine. Then she turned her back to Fate for just a moment, pouring the fruit wine into his drink.
As Kathy did so, she popped open a ring on her finger, and a deadly poison powder fell out of it into Fate's drink. It bubbled for a second, then went back to normal.
Kathy walked over to Fate and handed him the cup, all while observing him with the eyes of a predator watching her prey.
Kathy figured that Amara was not happy with her taking her job of killing Fate away from her.
Kathy apologized to Amara internally for a moment and promised to mention to the prince how hard Ruby and Amara were working on his behalf.
Nimrod wanted Fate's wealth just as much as Kathy. Because then he would marry her and help Kathy take her mother's position.