Linda, I've always heard that men tend to handle problems and stresses in a whole different way than women do. When faced with a problem or feeling overwhelmed, women tend to want to talk it over with other women, kind of like what we do here. They mull it over, think outloud, ask for opinions, bounce ideas and possible solutions off of people, until they think things through and work it out. Men don't do that though. They don't sit around discussing their deepest thoughts and inner feelings with their friends. They withdraw (sometimes literally) and do their solitary pondering, crawling off in to their own personal "cave" and think things over by themselves until they work it out.
And maybe that's not such a bad thing. Men are "fixers". They don't want to talk about things, they just want to "fix" them and get on with it. It's probably very frustrating for him that he can't just "fix" your medical problems and he can't just "fix" the issues that your children have. He does have a lot to deal with and is probably also under a lot of stress. I'm not standing up for him because I think what he did this weekend was very selfish and inconsiderate, but maybe a little "respite" time to himself once in a while would do him a lot of good and help him to better be able to cope. If he has a day or a weekend maybe once a month where he can get away from everything, and have time to de-stress, unwind and regroup, it might make a lot of difference. You and KT can make plans for a girls weekend and do special things together. Just a suggestion ...