Try to not focus on what is what for now. Don't try to label anything, because it won't do you any good anyway. For now, this is about him, and it will be, until it isn't. I know that may not make sense today, although it will down the road.
This time is about you, and finding what you want and need for you, and your children.
MLC is a different animal than you have ever faced before. There is no set agenda for any of them, except destroy everything that was once stable in their lives. No two are the same, and they are all different , as each of us is different.
Try not to wonder about that. If he is MLC, then time will tell that tale, and by the time you need to have those answers, then they really won't matter anymore.
For now, try to rest as much as you can, breathe, meditate (if you normally do, maybe start if you don't), eat, relax when you can, and take care of your children.
Keep a close eye on any joint banking that you may have. IF he turns out to be MLC, then he will fly through money quickly.
Those are the important things for now.
You will cry, you will grow, you will laugh, you will wonder WTF, and you will heal....
And there are some amazing people here to help you with that.
Post often, and ask questions as you have them....
This is a long journey, for the WA and the LBS...
And regardless the outcome, you will BOTH come out the other side different people.