@Mocca8
Get your priorities straight OP.
You and your DC ARE the no.1 priority.
Any money you've 'given' him, consider it lost. Even if he DID manage to earn it back, YOU'D see bugger all of that money again.
Get your 'ducks in a row' asap ! Copies of all financial paperwork, finance agreements, car ownership details, insurance paperwork, bank accounts, savings, investments, business accounts etc (including the cash you've 'lent' the business !), passports, birth certificates.(Store all these with a friend or relative who is trustworthy)
Pack up all sentimental items secretly and again, store somewhere safe outside your home.
Get an appointment with a solicitor to discuss your rights etc and how best to proceed.
Use your savings to get yourself a rented place with the kids, and stop all the extra 'activities' that cost £600 per TERM ffs !
File for a divorce, and once you have your financial settlement and child maintenance you can live your life freely again.
You MUST leave him. You really don't have a choice, unless you are content for your eldest to live as Cinderella ? Complete with horrible Step-Father and Step-Grandparents who clearly only 'tolerate' her under duress ?
The 'divide' will only get worse, the older she gets. She will become the 'scapegoat' for everything
.
What the hell would/could her life be like if you, God forbid, became unwell or even died ?