I think the only way for true balance is both parents working the same number of hours for the same pay, with both partners doing 50/50 with the house. Pre children, it normally is the case for most couples.
Problem is, many women are paid considerably less than men. Still. So, inevitably, the woman's career/job takes a back seat. After all, it makes financial sense. So, whether she works part -time, not at all and whether her support network is good or poor or her physical or mental health is good or poor, the guilt creeps in.
Sometimes, we feel it in ourselves. If we can't contribute financially, we, quite rightly, need to contribute in other ways but here's the problem. How much 'other contribution' do we have to make to address the balance in terms of lack of salary? In terms of childcare and home admin, how much would be enough? Does it really mean we have to do EVERYTHING???? Potentially, this can be any time of the day or night, however we might be feeling in ourselves (i.e. exhausted, overwhelmed, physically unwell with the latest bug going round)?
I am just a bit worried that not working, not earning enough and so on is seen as needing to pay one's penance, whereas I think homemaking and childcare needs to be approached as a team.
Of course, for the sake of pragmatism, the one home the most does more but the point is, it shouldn't be seen as a duty (or else himself won't be happy). Nor should it mean that DH never gets up in the night, gets up early, cooks dinner, cleans the toilet.
After all, back in the day when both partners worked, cooking dinner and cleaning wasn't a problem, was it, even though, presumably, he worked full time then and, at the time, the empty, childfree house generated far less to do.