Given your history, your update is not surprising.
He has never been a good man and over the years, you've tied yourself to him for longer by having more children.
You're a SAHM so are financially dependent on him too, making it even more difficult.
he left me for a few months last year because he wasn't happy and came back and asked to make a go of it.
He left me, started a new relationship that didn't work out and came back to me
I've never been good enough for him, he's Always looked for something better. Constantly texting girls behind my back
he was taking my children to meet his new gf only after 4 weeks of knowing her
When I found out I was pregnant with my first child, I found out he had been seeing this other woman as well behind my back
Why oh why have I wasted my life with this man
Every time I said to him, what would you do if you had a child somewhere else as a 'mistake would you walk away from that one
You have an expectation of him to cheat on you. It's almost like you've accepted this is your life. There's no mistake of impregnating another woman. It is a conscious decision to have sex and ejaculate inside her....which a married man in a monogamous relationship shouldn't be doing.
We know he's a cruel specimen of a man....but you seem to have something in you that craves love from him in spite of how awfully he's treated you.
It's like you want/need a seal of approval from him. I don't know whether subconsciously you've felt in the past that having so many kids will keep him with you.
He's not a good man. He's mean, nasty and cruel. Some of the things he's said to you are just heartless.
Please start knowing you are worth a million of him and you don't deserve what he's doing.
I hope all us well with the baby... the stress your useless H has put you under is unforgivable.