it depends largely on the enviroment and family setting.
some are very close you can rarely tell they are from polygamous homes
some the differece is glaring.
sometimes the relationship between the wives goes a large extent to determine the level of closeness the childern would be.my mum came froma polygamous home but you would never know.they are so close knitted largely because they were all in one big house and their mums were each others friend.
