Dotsie,
since having a "second go" at motherhood with my baby daughter and going back to work full-time a year later, I have learnt that it is OK to modify my standards in housework and VERY OK to get my teenage sons to do more around the house. It is very good training for them as future husbands. The only thing they will not do for me is change nappies. (Sorry, I forgot, vomit is also a no-go area). I now have paid help to clean the house, rarely do the ironing more than once a fortnight and although the neighbours may not like the weediness of our garden, the earth has not stopped turning.
Don't expect things to be the same when you are putting in place choices that affect your whole life. And isn't change what makes life interesting?