If you are their yin, let them be your yang. And within their yang find your yin and let the other find their yang within your yin.
In other words if you’ve found a way to arrange your life as a couple in such a way that your strengths and contributions to the family compliment each other. Don’t make it 100% this for you and 100% that for the other. I think an 80/20 split and 20/80 split is ideal. So if you are rearing the children 80% of the time, let him do 20% of it. And if he is spending 80% on his career he should let you spend 20% toward your own ambitions. Finding the balance is key. But whatever you do, don’t do 50/50 then nobody gets good at anything and you just end up with a mediocre relationships.