Hermione and Ron listened to him in rapt attention, Ron with his arm around Hermione’s shoulders the entire time. It took Harry multiple attempts to get the story out about his mother and the prophesy, having to stop and restart multiple times as little nuances of the story returned to him - to their credit, Ron and Hermione kept their mouths shut the entire time, and simply listened, but both of them gasped in horror when he mentioned Snape telling Voldemort about the prophesy.