Claudette, 75, has shared a health update for her sister, who is currently battling a rare neurological disorder called Stiff-Person Syndrome. "She's working hard, but she doesn't have control over her muscles. What breaks my heart is that she's always been disciplined," Claudette told Canadian outlet 7 Jours. "She's always worked hard. Our mother always told her, 'You're going to do it well, you're going to do it properly.'". She continued, "It's true that in both our dreams and hers, the goal is to return to the stage. In what capacity? I don't know.".