What is the ruling on a wife masturbating to extinguish her desire after her husband has had intercourse with her and left her before she has achieved her full satisfaction, and he refuses to complete her gratification? And is it permissible for a man to force his wife to engage in sexual talk with him online, and what are the consequences if the wife refuses?

It was previously explained that masturbation is forbidden and that this is the view of the majority of scholars. The definition of necessity that would permit it is not what the questioner mentioned. It is not the husband's right to force his wife to speak sexually. If there is no assurance that no one will become aware of it, then there is no obedience to him in this matter.