You're doing remarkably well with things given the circumstances. You know what needs to be done if there is any chance in saving your M, and you're taking these things on quite well. It sounds like you are the epitome of grace under fire, and I commend you for that! It also sounds like you're doing an great job showing your kids that you love them no matter what the situation is, and that is great to see as well.
One question I have for you: You mentioned in your journal notes that one of your strategies is to do the minimum housework, chores, etc, unless it is for the kids or specifically asked of you by you W. Why is this one of your strategies? Is it because you've done the majority of the housework in the past and you want her to see some of your contributions to the M, or is it just to make her have more of a load on her shoulders? I can see your reasoning to some extent if it is the former, but even then I would be careful as it may cause more resentment (depending on the sitch and how little the minimum is). However, if you're doing it now and you've never been one to clean well or do much housework in the past, then maybe a good thing to do is pull a 180 and begin doing more of these chores. Just something I am curious about -- can you elaborate on your reasoning a bit?
Doing great Larry -- keep up the PMA, even if you have to fake it 'til you make it!