I too would appreciate help in finding a story I had read once please?

It was of a lady standing in the shadows hidden, as the funeral procession of her Master was slowly going by.
Somehow in the story no one knew of their liasons so therefore she was a secret..I'm thinking something along the lines of "Masters Secret"?
She had walked up to this casket and pressed a note in her late Masters hand before she hurried away and in the story it had told what was in the note.