Good, well done.
I'm sorry, but how can any decent man "not realise" that blackmailing and threatening someone into having sex is upsetting? I mean, really? In fact, it is rape. Perhaps it's time he "realised" that at least. You can report him for it.
He's lying to you.
You have been horribly bullied, abused for a long time, you poor love.
What sort of support do you have in rl? Are you still talking to WA? Can you get onto a Freedom Programme, or at least some NHS counselling? Perhaps if you went to your gp, told what has been going on and ask for some counselling? I think you definitely need help in rl, firstly for the initial period of him being elsewhere, and secondly to help you set good boundaries, so that you don't ever wind up being treated like this again and to ensure your children are protected too.
He will probably try to crawl back in soon. He won't have done anything like looking at counselling, but he will happily lie to you about it. He will make lots of lovely promises, but he won't keep them. He will try to make you feel guilty - how much he misses the children (the ones he can't quite manage to look after), how much he luuuuuuurves you, how he understands what he did wrong (getting caught?) and so on.
Don't listen to a word of it. Don't let him in the house. Don't answer his phone calls or texts. If he turns up, call the police. Seriously. He will be more dangerous now.
Protect your children and protect yourself.
Keep posting.