Well done OP, I am very very happy for you.
I agree with keeping your cards very close to your chest.
Maybe “I came into just enough money to buy us a house “
I hope the Advisor the Lottery send is helpful. It seems very sensible to keep your job, this money will give you a secure home and a rainy day fund , but running a house will come with its own expenses, higher bills, buildings insurance, maintenance costs etc that don’t currently need to worry about.
I would also wait until things settle before tying up money in anything other than your house.
However, in the meantime, because Premium Bond winnings and ISA interest is tax free I would park some there until you decide what to do.
You sound sensible and grounded. Keeping your job means you keep building your pension. I would rather keep working now and have the option to retire early than stop / reduce work now and not know what the future might hold.
Choose a house that suits you and your Dc now, wrt area, school, think about secondary if they are currently primary.
You can always move / downsize once the Dc are independent or you retire.
I am really sorry you have your horribleness to deal with. I hope you are not still married, if you ever were?
If he really is dangerous, seek legal advice.
Take the Dc out to celebrate but don’t tell them why or the details. Kids are absolute sieves about confidential information and shouldn’t be put in a position to lie to their Dad.
I hope you can celebrate in your own discreet way OP. It’s fantastic news!