With all due respect @Em1988x please take your blinders off!!!
He did not cry for you when you told him how he stole your motherhood - he cried for himself and as a manipulation tactic that he knows works with you.
He was never planning on saving for a mortgage - he asked you for a year because he knew he could guilt you into doing it by making himself seem like he will be the one to leave so you could stay. Utter bollocks the lot of it, he only said that so you would stay!! That is the only reason, he has and never had any intention of leaving, and he has not intention of letting you leave either.
He threatened your boyfriend/colleague to you - did he ever make those threats directly to him? I would be willing to bet that he did not. No he made those threats to you, so that you would think the only way to save this man from your husbands fate was to go back to your husband.
He demanded you quit your job - but has now said you can continue work but must only work from home. This is not as a favour to you, it’s a bloody favour to himself so you can continue to bring home the bacon and pay the bills etc.
He promises from now on a wonderful life - if he was always capable of giving you this wonderful life why hasn’t he given it to you before??? He has no god damn intention of giving you said wonderful life, what he will do is the exact opposite and he will guilt you, accuse you, track you and never give you a moments bloody peace. Why on gods green earth would you believe this, he has even done this to you once before!!! This time will be no different!
He is NOT a good Dad - I promise you this that he is not! Yes he may play with them, he may do things for them or give them attention, but you can watch that evaporate as soon as he can no longer use them as a tool to manipulate and control you.
You should absolutely and utterly 1 million percent leave and not look back. Yes it will be hard, yes the kids will be upset, there will be fall out, but my goodness you would be giving yourself and your children the biggest gift, you just can’t see it yet because you are currently paralysed by fear and still allowing him to manipulate you.
Be strong and leave!!! 💐