(She didnt recognize her from the memory all she knew was that her grand father has been teaching a kid something that she never knew about so she basically doesnt know that Marvin was teaching Robyn)
"..Why-Why..didn't he tell me about you-He-Wh-I-...."
She looked so confused and betrayed, as she was talking to her she started walking in circles. She looked like she was anxious or she was about to start hyperventilating because of this unbearable betrayal she feels.