@Bumpyroads is he the sort of man who would respond to costing what you do as 'primary caregiver'?
Day nanny
Night nanny
Cook
Housekeeper & cleaner
You're looking at the thick end of a hundred grand BEFORE pension contributions & employer NI for that workload.
So no, you're not supposed to be carrying 100% of that on your own. Not even 80%.
You're supposed to be a team.
You're supposed to be capable of parenting all of your children together and independently.
You're supposed to be able to be in hospital, or go to see family for 3 or 4 days without the other one having a complete catastrophe.
Time to have a 'we need to be aware of what the other does' parenting relationship.... That means you get to find out what savings accounts you have, what your family pension pot is tracking to be, which utility companies you are with, what payment plan you're set up on, what the account login passwords are etc. What life insurance he has (and that it's up to date you and all DC are named as dependents). Similarly with any pension & health insurance. You need to know how to keep your family on an even keel if he were to go under a bus (no suggestions of who might put him there, though!)
He needs to find out how to change nappies, wash & dress children. Make food for all, ideally without resorting to only pizza (for their long term health & a decent fibre intake for their short term health!). How to do enough washing in a week without shrinking anything or leaving it damp & mouldy. How to clean enough in the kitchen, bathroom, surfaces & floors that no-one gets sick (possibly a different standard to your own, but not being ill is the key benchmark!).
It sounds like he's got used to you not working and assuming the position of billy big bollocks for bringing in the family income. It's time to hammer home how much he would have to PAY an assortment of capable human beings to keep his family in the manner you do, if you just disappeared overnight.
On the realities of such family economics and workload, can teamwork truly be built!
(and as a bonus, if he's lucky, you might even salvage enough respect for him as a competent human being to actively want him anywhere near you with his sexual organs again? A heavy dose of 1950s attitude is a pretty good prophylactic for ever wanting any intimacy again though!)