I think you are trying to justify your relationship because you know you are being treated unfairly but because you are pregnant you are desperate that he will change.
He will not.
My partner will be SAHD if we are lucky enough to have a baby born.
We discussed being a SAHP extensively while I carried our first.
He would be responsible for the home and childcare while I would cover finances.
Does this man do child and home care?
Or does he leave that to you as well.
It sounds like what the idea would be, him as SAHD pulling his weight, is the dream.
While the reality is not that at all and will not change because this man won't change.
He should be carrying the bulk of home care and childcare while you are at work once the abby is orh but should be doing the bulk of home care now while not working as much.
He should not be charging you for petrol, or acting as though you should subsidise him for that when you do for everything else.
If he steps up now in the home and about the petrol it could work.
If he does not, do not rely on change for people will not do so without major incentive