"And we enjoined on man (to be good) to his parents. In pain upon pain did his mother bear him and his weaning took two years. So show gratitude to Me and to your parents. To Me is the final destiny. But if they strive to make you join in worship with Me things of which you have no knowledge, obey them not. Yet bear them company in this life with justice and consideration and follow the way of those who turn to Me. In the end, the return of you all is to Me and I shall tell you (the truth and meaning of) all that you used to do."

(Surah Luqman, 31: 14-15).

The only time when one is allowed to disobey one's parents. Besides this, there's no reason not to be good to them.