I don’t think they usually lead a double life, what I’ve seen is that they tend to become attached to one particular culture which tends to come down to their surroundings.. my mum is part white but was brought up in Bangladesh and her culture, morals etc are totally Bengali and Muslim, she even wears hijab now, my cousin married an English guy, they live in a totally white part of London and he’s retained his English culture while another one of our friends married an English guy, settled in a desi area and he’s become totally Muslim, prays 5 times a day, learned Urdu and can even cook desi dishes lol.. I really do think most ppl are drawn to one culture rather than trying to keep up the balancing act of two completely different ones and as long as neither parents are particularly rigid the children tend to turn out normal, I’ve seen enough mixed marriages to notice the incidence of ‘out of control’ or ‘confused’ mixed-race kids seems to be no more than British-born Pakistanis, Bengalis or whatever.. Unfortunately Pakistani culture, prob cos of its tribal nature, tends to be suspicious of ‘outsiders’ whether it’s a person of a different caste, colour or nationality, this irrational need to stay within their ‘own’ is really unhealthy imo