Never. Neither of us are resentful of the other; I have a huge amount of respect and pride in him and his success, hard work and dedication. He takes equal pride and pleasure in my staying at home with our child and sorting all the house and admin out, taking care of him. But I have old fashioned and traditional values and so does he. Together we are a well-oiled machine and it really, really works.
But this is not for everyone.
Thanks for replying (and to the other posters who answered my question).
Right now, me and my partner earn roughly equal salaries, but there is definitely the opportunity for me to 'step up' in my role as my employer has hinted several times at further training and fast track-esque schemes - most of the senior management are promoted from within. However, given the business I work in, it would likely mean some unsocial hours and possibly being on call, or maybe something like a rolling 4 on/4 off shift pattern - but would have the potential to almost double my current salary.
We're both in our early 30s and not sure if we want kids (defo not in a hurry), but if I were to progress into the above role, it'd severely limit my ability to carry out, for example, childcare duties or a school run as I could be called in at short notice and would likely be working some unsociable shifts.
That's partly why I continue as I am, but if we do have kids and my partner wanted to take a step back, then I'd be happy to 'step up' at work. But I doubt I'd see it a 'priviledge', more a way to provide for my family. If I were single I really doubt I could be arsed with the stress/responsibility as I'm fairly comfortable already.