Harry certainly had no plans to.  He opened the door and showed her in, trailing behind her in what seemed to be bafflement.   If Draco had swooped in and played the knight errant, ready to rescue the damsel, Harry seemed more caught up in circumstances he couldn't control.  When Ron appeared, Hermione just shrugged at the question in his eyes.  He'd known her almost forever, however, and he read her immediately.  He looked back at Pansy and squinched up his face in disgust as if to say, "Really?"