I’ve just read your previous post. This is not just about financial abuse, is it? Your entire marriage has been destroyed because of his toxic, domineering behaviour. I actually shuddered when I read that he’d “guilted” you into having a termination. As you say yourself in that post, you are not living your life..... at all......and that is down to him.
These latest revelations about his financial abuse, for that is what this behaviour amounts to, compound matters further and you would be wise to take on board the sound advice you have had here and start taking (baby) steps to free yourself from his control. The road ahead will not be easy - heaven knows what will be unearthed when the banks start to investigate - and, as PP have indicated, there could well be police involvement in due course. You will have to stay strong and fight against any claim he might make that you authorised payments to your credit cards etc.
Abuse has a tendency to escalate; you need to think of your physical safety as well.
But, please try to look beyond the immediate future - look ahead to brighter days when you and your beautiful daughters can live the life you all deserve, unfettered by his nastiness and cruel behaviour.
You mention being worried about starting again at the age of 46, try not to be, although I appreciate that that is easier said than done. Many women, myself included, have unexpectedly found ourselves single in our 40’s, and guess what, we survived. Life is far to short for you to put up with all this.
It looks as though your brother is on board, and it looks as though your mum is too (I guess she’s staying relatively silent because she’s hoping you’ve seen the light at last!!).
Make the most of that support, it’ll prove to be so valuable.
Finally, to answer the question you raised in your previous post - No, this is not what marriage is about, but I’m guessing you’ve started to realise that now?
Good luck!