The picture you are thinking of just shows her holding the baby close to her breasts. She is not trying to breast feed her in that picture.
I agree. The baby is just being held close to her. Besides, there are many pictures of her feeding the infant, and it's always with a bottle. Remember the nanny's "document" saying the ANS made her heat the formula in the microwave?
Besides, if she had breast fed, we could bet that HKS would have sold photographs of that!