n Toula and her mother have a heart-to -heart talk in the kitchen about Toula’s relationship with Ian , what rule of marriage is the mother asserting?…

In the movie My Big fat greek wedding, When Toula and her mother have a heart-to -heart talk in the kitchen about Toula’s relationship with Ian , what rule of marriage is the mother asserting? Also ,What religious ritual helps make Ian more acceptable to Toula’s family as a prospective husband?