Could you maybe suggest meeting jointly or separately with a financial planner? Express a desire to make sure household expenses are covered and possibly invest in your kids future, but be clear that you don’t see her inheritance, however much it is, as a chance for you to buy a sports car or something.
My parents had a joint account for household expenses and would discuss how to split major purchases like new cars, but they both had separate accounts and investments.
As an actual game it was pretty terrible. Unique skills only being learnable by a single person, multiple nested menus to perform basic functions like equipping something, lots of questionable things like overtuned traps and trap rooms in low level areas.