Can I suggest you do call his superiors as you will be doing him and you a favour. Only cowards threaten suicide, to threaten suicide is one thing, to go through with it is another. Its a cry for help, and he obviously needs it, but so do you. Don't continue to be the one blamed and made take on his baggage. You can talk to his superiors in a confidential way as he is also a danger to the public if he loses it on a job, think of the consequences for everyone here, not just him, but you and your kids. I had my first husband threaten suicide and the best thing I did was to stand up to him, call his parents and told them to come and get him as I wasn't cleaning up the mess, it worked a treat and blew them all away. It will be hard, but keep in mind its everyones safety here that is important.