Is a two-consecutive-month expiation obligatory upon the mother whose disabled maternal uncle, under her care, died after he got lost and had an accident, knowing that she searched for him?

It appears that the mother bears no sin or birth-related expiation for the death of her imbecile brother, as there was no causation, direct action, or negligence on her part.

However, if the guardianship of her maternal uncle was her responsibility by religious law, and she neglected his protection, then she incurs sin and must repent and seek forgiveness. The ruling for an imbecile in guardianship is the same as for a child.

Blood money (Diyah) and expiation are incumbent upon whoever caused harm to the maternal uncle in the accident.