Is it permissible to kiss one's wife on the mouth inside a car, away from people's eyes?

There is no harm for the spouses to be in seclusion, but they should avoid situations that may raise suspicions and accusations, for the Prophet, peace and blessings be upon him, said: "Indeed, Satan flows through the human being like blood, and I feared that he might cast evil into your hearts." As for the hijab, its ruling and what is incumbent upon the husband regarding his wife who refuses to wear it have been previously clarified.