How can I deal with my siblings watching TV and the "poisons" it contains, incited by my mother, and the disputes this causes, as well as fears of telling my father?

The Muslim is commanded to change the evil (munkar) with his hand; if he is unable, then with his tongue; if he is unable, then with his heart, while ensuring that the change does not lead to a greater evil. If informing the father about what is happening will lead to a greater evil, then he should not be informed. The mother and siblings should be advised with the tongue and heart, while maintaining good manners and gentle speech with the mother. Efforts should be made to provide recreational and cultural alternatives to watching these "poisons," and one should be a good example in righteousness and uprightness.