At the end of the episode, Uncle Phil, Carlton, and Will are sitting around a table. Aunt Vivian comes in to say she's going to the hair salon and she walks out the door. A few seconds later, you see her through the window in the background going back into the house through another door.
At the 4:17 through 4:22 mark, you can clearly see two trails of black stains on the kitchen floor. The butler Geoffrey who was also in the kitchen at the time, was supposed to clean those stains up, but he didn't even notice them.