No, it's the traditional question children ask a king or queen: where's your golden crown? Mathilde answers very generally that she doesn't have a crown. Instead she has a few diadems/tiaras that she puts on for very special occasions.
I highly doubt Mathilde would ever say anything about Fabiola's will in an interview (with children's questions).
You're so eager you're reading too much into this :-)
: Mathilde did an interview with Belgian
: magazine Libelle. Some kid asked her about
: having a gold crown/coronnet.(kroontje in
: dutch: I think can be roughly translated
: into coronnet/crown). She denied but said
: she did own a few diadems. Could this mean
: that she didn't get the wedding gift tiara,
: as one setting is that of a crown?