Just wanted to add my admiration and support for @Waffletots and best wishes for the future.
One thing I do want to add, is if at any point, emotions take over and you do have a wobble, be extremely kind to yourself. There's an element of grief in a situation like this, not for custard features himself, necessarily, but for a past life and for the hopes and dreams you had.
Anger is natural and part of the process. I say this as a divorcee and a widow. The only people you need to consider are you, and your little ones, and you will be busy for a long while. If, even months down the line, you crash a bit, I'm so glad you have such a great family support network.
Take the very best care of yourself my lovely, and may your future be bright - you absolutely deserve the very best ❤️