Kara has changed into an all black outfit, and sitting in a corner she says:
"OK, you want to set up right here in front of me?" she says.
You are afraid of masturcizing in the hyper-teased state that you are in, especially so close to her. But you know you must do it, since you promised Erica to do what Kara wants.
And the black outfit that Kara is wearing adds to your anxiety, as it reminds you of Erica's dominatrix outfit. Indeed, black seems to make Kara more sexy and commanding. You start feeling very submissive to her.