How are things going? Are you planning on posting here as well. It will be much easier to follow if you stick with one thread.
I read a recent post of yours regarding finding the boxes labeled. My children are still very young. I do see behavioral changes in them already. I'm not sure on what to advise you to tell your children being that they older than mine.
I'm sure others will help. They do know something is up. Whatever you do. Don't speak to them about anything being wrong with mom. Or say anything negative about her. If she is suffering from MLC they will see this on their own. Make sure you are open with them and let them know it's ok to talk and ask questions. They need you now more than ever.
Be careful not to place them in the middle as well. Like asking them questions about what mom said or did or where she went. This will do them harm.
Just a reminder, It sounds like you have a handle on things. I'll try to catch up on your other thread.