Is it permissible to adhere to a family custom that prevents a son from meeting with his father in the company of his wife, under the pretext of respecting the father, so long as this custom does not contradict a Sharia text?

Customs and traditions in Islamic law are of three types: those for which there is evidence of their validity, and thus must be adopted; those for which there is evidence of their invalidity, and thus are not to be considered due to their contradiction with Islamic law; and those about which Islamic law is silent. These silent customs are to be observed, based on Allah's saying: "Let a man of prosperity spend of his prosperity" (Quran 65:7), and His saying: "Hold to forgiveness, command what is good" (Quran 7:199). Also, based on the Prophet's (peace be upon him) saying to Hind: "Take what suffices you and your child righteously." Accordingly, there is no harm in considering and respecting this custom, following the example of the Messenger of Allah (peace be upon him) who approved of the customs of the Arabs as long as they did not contradict Islamic law.