She's not doing it for our eye. She's doing it for herself. She's stimming. Massaging and comforting herself trying to compensate for what's within. Clutching her pearls in plain sight distracted by her own inner turmoil to care what others see. It's like watching someone masturbate in public a little. She's more conscious of what she's feeling and compensating for that than what people are seeing. If she could she would just pull a burka over herself or run away into a nook or cranny to hide then play with her fanny.