You're the expert on keeping secrets. In fact, you're so good at it that you've been privy to several lately, many of which you really didn't want to hear. Now that you know, when it comes to those topics, don't be at all apologetic about keeping quiet. As you're quite aware, it's not just these secrets that are on the line now. It's also your reputation for trustworthiness, and you know how you feel about your reputation.