You are a strong woman OP and you will get through this.
You now need to focus on the practicalities, for your children’s sake. Your top priorities need to be
- Ensuring stability for the kids
- Your own mental and physical health and well being
What he wants, how he feels, what OW is like, what he thinks is fair and keeping him happy need to be WAY down the bottom of your list. Do not I repeat NOT get drawn into thinking/ obsessing about this right now.
You need your energy and focus on action . Remember he’s had years to plan this , he’s a long way ahead of you.
Take 3/4 of the money out of any joint accounts TODAY ( because you have 3 of the 4 people in the family to care for ). Move it to an account in your own name in a different bank ( not just a different branch ). If your solicitor tells you later than you should only have taken half, you can always transfer it back.
Make an appointment with a solicitor ASAP.
Get copies of all financial and legal documents.
See if you are entitled to any benefits.
Notify council tax and apply for single adult discount.
Tell the kids that their dad has left because he doesn’t want to be married anymore. They are old enough to suspect this , so at least be honest with them.
Let their school know you have separated in case the kids are upset in school. They will be supportive.
Tell any friends and family who will be supportive that he’s left you for OW. Don’t contact his family.
Don’t talk to any family or friends who are unsupportive. If they contact you, just say it’s too hard to talk about it right now.
Don’t listen to any victim blaming talk, there’s plenty time later to sign up for counselling / therapy to analyse what went wrong and when. This isn’t the time. You need only helpful people in your life right now.