Are my uncle's heirs obligated to pay the rent for my aunt's share in the heirs' house for 15 years to my aunt's heirs?

Resolving disputes falls within the purview of the judiciary, as it is capable of hearing from all parties involved in the dispute. A mufti, however, hears only from one party. Generally speaking:

1. It is not permissible for any heir to exclusively benefit from a shared asset without a legitimate right. 2. If one of the heirs occupies a shared house, the others have the right to demand their share of the fair rental value for the period of occupation. 3. If an heir dies and has a right against some of the other heirs, their own heirs can demand the right of their deceased relative from those who took it, provided they have proof of their right.

It is advisable to be gentle when demanding rights among family and relatives, to avoid a severance of ties.