Speak to somebody if you're that concerned mate. Child counselling can really help the kids following the break up of their parents. If you think they need help they probably do. Speak to someone today. Hope everything works out for them. X
@Martin Alvito this is great advice, they are stuck in the middle of this dispute with you and the mother and have a million questions they want answered.
Speaking to someone not involved in the situation will help everyone.
Also, for yourself seek help. Not 100% sure what is going on but the liver situation doesn't sound great. I'm guessing the 2 million is life insurance money but at the end of the day your kids would want you in there life , they might be angry now but that will pass. Seek the help to be with them in the long run.