Re: Rude Cousin
Nope. That way you can still cook it afterward. Why waste food and money? 
OP. Next time she insults you in the presence of people who don’t understand English, call her out. Tell her, “Why don’t you insult me in Urdu instead so that the people around us can also understand your words. I don’t want them to miss out cuz you do this often and I’ve stayed quiet for too long.” It’ll leave her speechless and embarrassed for a few moments but should soon lead to an open discussion between you two about the issue. Or you quietly put up with it and make yourself look classier…like Bint-e-Naeem said earlier…and she is right about reciting the surahs as well.