Have you made it clear to your DH that you don't want this talked about liberally? If so, I would feel violated, upset and have a major trust issue with him.
If you haven't made that clear, do so now, and let him know that future violations of this request will result in trust issues.
Are you sure he told her about your CF though? Somedays Mark is sick (related to CF) and I'll mention it to co-workers, but not mentioning his CF. I just mention that he's feeling sick, or has a cold, or has the flu, or just feels sickly. I didn't see where you mentioned that he told her about the CF.
If you haven't made that clear, do so now, and let him know that future violations of this request will result in trust issues.
Are you sure he told her about your CF though? Somedays Mark is sick (related to CF) and I'll mention it to co-workers, but not mentioning his CF. I just mention that he's feeling sick, or has a cold, or has the flu, or just feels sickly. I didn't see where you mentioned that he told her about the CF.