I agree with what DandyDan has just said. I know the previous poster was only speaking for herself, but as a SAHM to preschoolers and babies, you dont tend to get raised eyebrows generally - its very much acceptable to be home with them if you can afford to be - its generally universally accepted that many parents will do this in the same way that its generaly accepted that those who work will use nurseries and childminders.
However, there is less acceptance of parents/women who stay home once that young child has started school. Its as if that perfect job that is stimulating, well paid enough to justify after school clubs/childminders etc, local, flexible and the like is that easy to come by that you are crazy for not taking it up!
In my situation, not only can we afford for me to stay off indefinitely (good planning as well as a sprinkling of luck if you consider intelligent enough to go to university luck I suppose, getting on housing ladder etc) but my DH's job would make it very difficult for me to get work other than perhaps part time local. He travels a lot, does long hours at times, is 1.5 hours from home when he is in the office, and is often unavailable in meetings etc.
Okay so single parents "manage" to work and school hols etc so of course its possible, but its stressful, and if you dont need the money, it may just be better off for everyone if you are in the home. Particularly if you have been there and done that with the career/rat race thing. It doesnt have to be the woman, it could just as much have been the man in our situation, but as it turned out I was happy to give it all up and he was happy, in fact grateful, for me to do so.
But it doesn't need to mean your brain will turn to mash (not that its what the previous poster was saying, just that hers would). It really depends on how you spend that time when the children are at school. Which is only 6 hours. From what I've heard, it goes kind of fast and its time to pick them up again...