That's a tough one. I'm going to step inand give my two cents, even though I'm not trained in this and don't have a huge amount of experience.

Don't share it unless you have a specific setting that allows it to be digested by her slowly, and with professional help to put it into context, and even then have a good reason for doing so. Sharing this with her puts her in the situation of needing to balance her understanding and love of her husband with her love and protectiveness of her children. It's her job to worry about the kids, so even if she's 99% sure there's absolutely no danger, that 1% is hard to accept as a parent. As long as you're sure the situation is safe, saving her from having to obsess over the possibility of those scenarios is doing you both a favor.

This of course presupposes that you aren't really a danger, as you've noted. So as long as you're sure of that, I keeping it to yourself is better for your both. I'm of course an untrained outsider looking in though, so take this for whatever it's worth.