I hate to tell you to continue being on guard, but frankly I can't see much positive in your post. There are so many flags on this play they're covering the field. I'm so sorry. Could your husband beat the odds? Sure, some have, but I kinda just see doom and gloom on the horizon.
Please take the advice to start attending al-anon, take care of yourself and your #1 priority - your children - and let him do his "recovery". I don't know what else you can do at this moment.