The payment for the kids now is their accommodation and food while they are both at university. Not maintenance since they started uni, sorry. The mortgage, the house is still in both DH and ex-W's names, the divorce settlement is that he continues to pay for the mortgage and they share the equity when they sell the house.
The youngest started uni last year and the oldest the year before. Practically, it has not made sense to sell the house since then as they come to London 1/2 a month and stay in the house. We live in a flat in London and they visit us each time but very rarely stay. I get on really well with the kids there is much love, still, I prefer they stay in the house and not with us for more than a night or two.
They divorced 15 years ago and since the start-up there has been little in the way of nice-to-haves, he's taken the kids on holidays once every two years', low spend on gifts etc. Since we got together I have insisted on my lifestyle and holidays and have paid for him, otherwise I may as well have not had a relationship with him.
DH has always said first thing we do when he makes any money is reinstate my savings and payback all the money to me. But nothing written down. I don't own a stake. But we are married and I enabled him to build this so i am confident in owning half of it in court any day. I know the business quite well and it is a viable business and innovative and he is building tech to catch up with it. Even this week he is raising financing with investors money coming in.
I suppose what i wanted help with is how I can continue to fund, how not to feel resentment - from others who have been in this place before. The way i looked at this back then and more often than not, even now, is that i am supporting my DH in his dream. If the kids were ours wouldn't i do this and why does it matter if they are not mine. But if they were mine, they'd have jobs ffs! of course, there is no point talking about that in the current. circumstances.