fedupone (and hc), just a thought, but do you take holidays?
we are pretty autonomous, but we are ALWAYS in HE mode. By which I mean that if they kids ask a question, show an interest, etc in something, we ALWAYS follow it up with books, etc, until they are satisfied, whether its 9am on a weekday, or 8pm on a Saturday night. In short, we are rubbish at giving ourselves a break. We do it when grandparents are around, then they field the questions!
Every teacher I have ever known sometimes gets fed up to the back teeth of teaching. This is because it is a hard, exhausting, profession. Essentially we are doing the same as teachers, but in addition to being pretty much unpaid, most people think we that we are a bit mad.
What do you Do you actually want to stop? Deep down, do you want your kids in school? Or do you want some respect from them? Or your husband? Do you want a supportive local HE scene? (have you explored all options here? could you travel? Our local scene is quite quiet, and I suppose we struggle to meet once a week, so we travel. If you can work out what you want then perhaps we can help you work out ways to get it .