Mark,
I wish I had the words to express how sorry I am for your pain and plight. I believe your own sufferings have turned you into an angel of mercy for so many of us... you have walked a mile in our shoes... but it ultimately makes it no easier to bear.
You also need to know that in a marriage, it is usually agreed upon that only one of you can go crazy at any given time so you'd better discuss this flair up with Diane and decide which of you needs to take care of the other! Maybe you can delegate that responsibillity to the 10 month old.
Please take care - and I hope this doesn't affect dinner
All my best, Dale