Yikes. This is going to be hard work for you. He came straight from mummy doing everything to his special new mummy who he can have sex with, doing everything.
And that’s how it’s stayed.
It is unthinkable that you have never had a day off, never been able to go anywhere, so anything. Have you ever even been out for a drink with friends?!! I don’t think you have.
You’re going to have to become incredibly tough, unshakeable and no-nonsense. Present him with a spreadsheet showing a clear division of labour.
Do not martyr yourself and do his when he (and he will) spectacularly fail to do any of his. He’s used to you doing it and he knows fine well you’ll cage and do his as well as yours, while working full time. DON’T.
You need to teach your kids to grow up a bit and take responsibility for themselves. They can get their own breakfast, they can shower themselves, sort their own laundry, make their own beds, do their own homework, get themselves to school, put themselves to bed…! You’re currently creating a new entitled generation who expects the woman in the house to wait in them hand and foot. And that is wrong.
You need to protect yourself and your time and I’ll say it again, you need to wise up and toughen up, and do not cave and wind up doing it all. You’ll crash and burn, and as you’ve already learnt, there’s fuck all support for you in your house.