The kick of her legs, slapping of her hands and the way she squirmed under her hand did have an effect. It make it slightly harder for her to maintain good leverage, but it was only slightly as by this point she had dug in deeply and worked to work over that core of hers and cause as much discomfort as she could which seemed to reflect in her whimpers and cries of pain.
Then Amaya came to a stop, out of the blue as her hand lifted up and she seemingly granted Haruka a reprieve. However, this would be but the calm before the storm as Amaya aimed to make an exclamation point & deal damage to the nurse all in one go...as she would work to try and stand on the prone nurse's stomach and literally try to stand upon her.