I hope that this makes sense.
Dh works full time, I work part time 2.5 days per week.
As far as I'm aware dh is more than happy with this, our youngest hasn't started school yet so it works all round.
I do all school/nursery runs, I cover all sickness, parents evenings, sports day, I sort all school holidays for the eldest.
Dhs hours don't permit any school or nursery drop off and pick ups and he gets minimal annual leave to cover school holidays, his employer also wouldn't permit days off at short notice for the inevitable illness.
Some of dhs family have insinuated that I have the life of riley and that I should do more hours at work or that I'm very lucky. (I'm looking at you fil). Dhs mother did not work until her children left school and some of the others with opinions don't even have children.
Although I could do more hours when the youngest starts school, it would mean arranging childcare for before/after school, school holidays and I'd still be covering sick days.