Tad, I don't post as often as I use to do. I still read, but there are so many here that are providing exceptional advice, that I step back and let them take the floor as I can't say it any better than they do.
As for your wife, they sometimes drop comments/statements on to others, i.e., hoping that they will get back to you. It's to get a reaction from you and to string you along. Maybe her comments are innocent ones and she meant them, but who knows what is going through her mind. But, do not react to anything she says or does in front of your children or her. Your children need to be left out of the equation when dealing with her nutty behavior. It's very difficult for them to see this going on and not to take sides. If your son relays any comments about what she has said, just smile and let it go.
Your friend needs to stop relaying to you what is out on Facebook. You are not at a place whereby it will just roll off your back yet. You willl need to let him know the next time he wants to tell you something and advise him that you are just not interested.
Some mlcers will embrace god and religion during their crisis and others may go the other way. Whatever they were prior to mlc, they will now be the oppoosite. Just remember, they do not like to be diagnosed as having anything wrong with them. They do not think it's them, but us...to them, everything is fine and that they are not acting out of character. They see absolutely nothing wrong with what they are doing. If they did, they would have crashed and burned from the guilt, etc. They can' face that guilt right now. Some will later on and others will remain forever in crisis or a pod person.
Good luck tomorrow! I'll be checking on you in the evening.
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.