Don't be offended by this, but I really don't think your husband should read it before you do. Read it yourself, and then if it's something harmless, which it probably is, there is no need to even tell your husband. Like, if he asks you a question about something inane, or whatever. If he is writing to tell you his undying love, then tell your husband about it right away, hopefully as a joke, and let him read it and see what it says. Since you have no idea what's in it, there might be something you don't want him to see. I mean, your past from eight years ago is your past, right?