Amaya saw Haruka as she tried to wiggle herself and by extension her towards the ropes as she tried to reach out for it, the ref keeping an eye waiting for her hand to reach the rope or her submission to be heard. Amaya aimed to try and stop her attempt, not simply by pulling back to really bend her body back but also using a free hand to adopt....one of the more "sensual" tactics Haruka had used as she aimed to grasp her breast to cup a feel.
Her face blushed, but she figured this would be the last thing Haruka expected and the sensation from that she hoped would stop her. Either that or she'd be able to get to the ropes to force a break...