Does sin befall the divorced woman and her children, or her ex-husband, due to his refusal to install a private water meter for the rented apartment, knowing that this is the third divorce and that the apartment is registered in his name?

Bringing water to the building in this manner is a prohibited transgression. It is not permissible for you or your children to benefit from this water, even if you are not renting the apartment, because usurped property is not owned through a gift; rather, the recipient guarantees it if they know it was usurped. The obligation is to install a water meter, or to estimate the value of water consumption and return it to the responsible authority. If that is not possible, the amount should be spent on the welfare of the Muslims.