I'd really like to get your opinions on my slightly odd marriage set up. I don't know how I've ended up here and think I'm pretty conventional but this situation is far from the norm. I'll try to keep it short but with all relevant info.
We're married and mid-40s. Second time for both he has young adult children and I don't. We've been together about 10 years in total. Married for five. We earn roughly around the same and I helped him with some of the costs for his children when they were with us but I never paid any of his child maintenance (by that I mean I paid half towards days out, birthday presents, holidays that sort of thing) . I had no part in his first marriage break-up.
He's inherited a substantial sum from an unmarried great aunt - somewhere in the region of 5 x years worth of our joint salaries. Not life changing or enough to retire on but still a nice and slightly unexpected bonus. He was not close to the aunt and didn't see her regularly so this sad occasion doesn't have a huge emotional toll (sorry if that sounds harsh I think it would be different if it were a closer family member).
We have a small mortgage which we've always overpaid to protect us in old age as neither or us thought there would be any inheritance from anywhere and too much fun in our 20s (and children in his case) meant little pension provisions until much too late.
This money is his and he's made this very clear. (I know we're married so I think it's both if we split). I have no intention of splitting with him though. He's buying a fancy new car. He's paying off some small credit card debt and going on a boys holiday! I have no problem with the holiday this was planned but I also have a small debt (£5.5k) and for him to pay this off for me wouldn't make a big dent in his money. My car is fine so I don't need a new car. We don't have joint accounts and never have. We always earned almost the same so apart from his child costs we were equal. I now feel he's punishing me for not contributing to his child maintenance when he was paying. Both kids are now working full time (no Uni).
AIBU to think he's being incredibly selfish or is he right and the money is his to do what he likes with? I don't think he has plans to give his kids any of it at this point but they are looked after in his will (as they should be).