That a housewife (or husband) must necessarily have it pretty easy and sit around eating bon bons all day or something. That might well be the case for some people, but it is certainly not a given.
In my case, DH travels 80-90% of the time for work. Which means I handle basically 100% of household work, yardwork, bills, etc. I also schedule all of his appoints for doctors or whatnot, around the rare days he is in town. I drive him and his colleagues to airports and train stations nearly every week, I entertain spouses who come into town with his co workers, I research and fill in applications and handle as much as i can for him when applying for visas for some of his trips (once upon a time there were assistants who did these things, but not anymore---as they retired the bean counters decided to not replace them and just overload people already working lots of hours).
I love the flexibility and that I am able to volunteer during normal work hours (I am the OCC for local girl scouts and lead a troop as well as working with the refugees) a nd I do not put in anywhere near a 40 hour week doing "corporate wife" stuff, but I probably put in 15-20 hours most weeks, plus that 100% of house/yard/errand work that we would split closer to 50/50 if i worked and DH had a job with less travel. It totally works for DH and I and we are both very happy with it--but it irks me some (and DH a lot, actually) when people insinuate that I am basically on vacation all the time.