I read somewhere that the worst marriages are those that are not bad enough to leave. You must be feeling some financial responsibility for him because he can no longer work and because he is sick. If he is talking to other women, and he thinks this is ok, you have a huge problem on your hands. Sounds like he doesn't respect you and he thinks you'll stick by him, because you always have in the past. Take a look at your behavior and why you are putting up with his bad behavior. Work on yourself because you're the only person you can change.