ANSWER:

It is not permissible even for them to chit-chat unnecessarily with non mahrams as the rules of Allah are same for everyone. 

Usually parents take severe measures to ensure their kids dont mix with the opposite gender in schools and colleges. (Which is understandable) But at the same time they themselves talk and interact with cousins and even distant relatives of the opposite sex in a very casual manner and sometimes with no boundaries. And then they say thay they are “family” so its okay. Isn’t this hypocrisy?

Mahram |