What is the ruling regarding children who witness their mother committing adultery: are they required to bring four witnesses, or what should they do? And what is the ruling if they kill her immediately?

Adultery is one of the most heinous sins. The children must prevent their adulterous mother from this evil and conceal her, not exposing her. It is not permissible for them to report her to the ruler or testify against her, because the parent is the cause of the child’s existence, and it is not permissible for the child to be the cause of ending their parent’s life. This includes bringing witnesses whose testimony could lead to her death.