Question juridique clé
Whether the cantonal order joining proceedings and admitting the first ex-wife as an interested party violated federal law.
Solution extraite
No federal-law violation was shown; the joinder was consistent with the prior remand, which required clarification of overinsurance and dependency loss.
Motifs extraits
The appellant lacked a protected interest in challenging the joinder after she herself had initiated a new filing. The original claim remained the dispute, now limited to the ex-wife’s alleged dependency loss/overinsurance.