@Brokenhearted30
FFS I bet you wish you knew when you married this arsehat, what an utter twat he is. So much for 'in sickness and in health,' eh?
Funny how some people MEN don't handle it very well, and resent it deeply when things don't go THEIR way. Looking after his own children is a chore is it? What a bastard. 
You have my utmost sympathy OP. I would be getting my ducks in a row, and making an exit plan right now. No WAY would I be spending my the rest of life with this man. Sorry.
This all puts me in mind of a man I know who left his wife (when they were both 44,) and also his DD and DS when they were 12 and 10, and fucked off with another woman. Said OW was 29, slim, career-driven, and fun-loving (a bit like his wife when they met before the drudgery of 15 years being married to him and raising his 2 kids took over, and she gained 4 stone.)
He married the OW (after his wife divorced him for adultery,) and she got pregnant fairly quickly. She had twin boys. When they were 6 months old, she was involved in a serious car crash, and became quite severely disabled. Paralysed from the chest down actually, with very little use in her arms for the first 6 months after the accident, and she needed a lot of care.
So he went from having a cool and sassy younger woman who was very career orientated, a high earner, and very sporty, to having someone who needed help to shower, to be fed, and to go to the loo. Obviously she couldn't do anything either, like any housework or chores, or shopping, or cooking, or driving, or childcare or ANYTHING.
So his life was 100% caring for this new woman, and the twin boys. His career - and life - was put on hold indefinitely, and it put a massive strain on the marriage. A year and a half after her accident (when the twins had just turned two,) he left her (and the twins.) He just packed a couple of suitcases, and fucked off!
Her parents had to take her in (and the twins) to take care of them all.
The OP's DH sounds like someone who is capable of doing this, so I would be very careful OP!!!