Delphine Boël gave an interview to dutch tv show "TV show", i expect the link will only be available for a few days, but in case anyone is interested:
TV Show kijk je op npo.nl
(her interview starts at about 30 min., the voiceover is in dutch, but the interview in english, so i think you'll get the gist quite well)
Not really anything new ("TV show" is a bit of a "nice interview" show, not one for groundbreaking revelations) but she does state her reason for continuing the courtcase to get a dna test of K.Albert is not about money or "being a princess", but about identity i.o.w knowing who her biological father is, for herself, her kids (and maybe later grandkids).
She also mentions that if she hadn't had children, she might not have pursued the issue as it's a very hard proces to go through.
In her artwork you can see that "truth" is an important motive for her at the moment.