What is the ruling on dealing with a female relative who has committed adultery (as is heard), and is it permissible to boycott her and prevent her from going out, knowing that her husband has been traveling for eight years?

The maternal aunt is like a mother; she must be respected, her rights preserved, and treated with kindness. It is not permissible to believe rumors spread about her unless there is clear evidence, for accusing someone of adultery without evidence is a crime, and one's honor is inviolable. Therefore, the maternal aunt should not be shunned due to rumors. However, if something suspicious appears from her, there is no harm in regulating her comings and goings in a way deemed most beneficial for her.