Don't say anything to S12 about MLC. It portrays a negative image of his Mother and that can be disheartening to a 12 year old boy.
Try to keep this between you and W for the moment. If he ask, tell him your going through some difficulties but that you will work it out between the two of you. Reinforce to him that it has no affect on your relationship with him and that his M and you will both be there for him.
Don't act like a victim or portray her as the bad person in this in front of him. It affects a child's sense of security and loyalty to both parents. You need to be very sensitive about this.
"It is curious that physical courage should be so common in the world and moral courage so rare." -Mark Twain
