Thank you for the replies! I was with the company for three and a half years and never had any issue with security breaches or disclosing information. We were never trained on it, but the general understanding was that you don't disclose information that the customer wouldn't already have access to. That's where I screwed up: the mother wouldn't have had access to any of it without me. It didn't matter that at that time none of us knew that there was an escalating situation. We'd never had it happen before, so I don't know if it would be the normal resolution or not.
I think they're giving me a severance for a few reasons, but you guys are right -- there's really no reason for me to drag this out. I'll be glad that I was offered anything and move on.

