She did not need King Albert's money because she was the daughter of jonkheer Jacques Boël, one of the wealthiest men of Belgium, who was her legal father for almost 5 decades.
But now Delphine herself has fought this paternity. Result: she is without any legal father.
This means she has no any inheritance at the moment. Not from Jacques Boël (who -according Delphine herself- had done everything anyway to make sure Delphine would not inherit any centime) and not from Albert de Belgique.
We can say that her actions have thrown away an immense fortune to inherit. Had she remained private, whe would one day have been one of the wealthiest ladies of Belgium, thanks to the Boël inheritance. The fortune of King Albert is most likely much smaller ánd has to be divided with more, whereas Delphine was Boël's only child.