not true, sure there are few will go and have unconditional affairs, but the family and tribe structure make it hard, not impossible tho. if she decided she will be abandoned from the family, becomes a pariah, and you either have to become a muslim or she leave islam, veeery very few girls are willing to go through all that only for the man to leave her after few years, because westerners are stereotyped in arab worlds as not faithful, guy or girl, so it's kinda a lost bet for the girl.
Jihadi