"Because we were in the middle of rescuing Fleur, then we had to get her back, only to find Puddingarde under siege. Oh, and I died, lest I forget. We all had enough going on without me adding that to the list, and after I told Celestia and Luna about it they asked me to keep it a secret. There was also the thing where the Church of the Lady might have found out and released her. Seems I was looking at the wrong ponies though, because it was the Viscount that told the council about her in exchange for his life. Basically he's damned the world just to keep himself alive."