I can't tell you how to handle this, and I have never been in a similar situation before (closest being having to disable accounts for the other person on my te

I can't tell you how to handle this, and I have never been in a similar situation before (closest being having to disable accounts for the other person on my team) but here are two thoughts: Firstly, You don't know for sure what will the client do - with a high probability they will do just like you've said, but I'm not sure it is your obligation to force their hand so to speak, by making that possibility public. Also, if you decide to proceed with telling your coworkers I'd first think whether your employer can accuse you of disclosing what, in their mind, may be confidential information - you're part of the organisation, and "I found it by accident" may not be a strong enough argument to protect yourself from getting reprimended or even fired. However, I think what's more important in your case is your wife's insistence on you not telling anyone. If I were in your shoes I'd probably try talking to her some more, explaining how not telling your coworkers is affecting your wellbeing, and that will probably become a bigger issue the closer to the April deadline it gets, as your uncertainty grows. I’d even suggest that you together talk with some close and trusted friends, or even a professional, to try and make some sense out of the situation. If you can't reach an agreement, I'd probably suggest siding with your wife - the knowledge you've acquired, while somewhat heavy, is nowhere heavy enough to put it over your own family. In the end, I can only share my sympathy - It's not an enviable place to find oneself in. I just hope that, whatever you decide, you’ll be able to make peace with that and move on.