Ruby will see that the only exit to the cave is the one they came in through, which is currently blocked off by Kate. "I wasn't giving you the choice," she states, her tails curling around, one of them pushing her forward until she is right next to her pussy, which does look large enough to take her. "Get. In." She commands again. The tail which she pushed the riolu forward with glows slightly, placing a curse upon the little pokemon which is designed to stop her from getting away. She will be incapable of running more than ten feet from Kate at any time. Kate actually used this curse as a means to keep her nearby until she is done reforming her friend, but she wouldn't tell her that.