Is giving a ride to a relative who works in a usurious bank to the airport considered cooperation in sin and transgression? And is the questioner sinful for driving his mother and relatives to events where musical instruments are present, with the intention of fulfilling his duty of guardianship?

It is not permissible for you to give your uncle a ride if you know that the purpose of his journey involves sin. Similarly, it is not permissible for you to give your relatives a ride to a wedding if you know it includes wrongdoing, based on the Almighty's saying: "And do not cooperate in sin and aggression." Let your abstention from this act be a form of enjoining good and forbidding evil with kindness. Furthermore, a man's guardianship requires him to prevent those under his care from wrongdoing and to command them to do good.