My pregnant sister is craving for really bad stuff (i.e. junk food). How did you combat your cravings?

Just give her a tiny portion of chips with fruits and lots of water. Cravings are called cravings for a reason, there are alternatives though like mixed nuts but it wouldn't be as satisfying as the real one so just give her some just to get it over with, she'll feel guilty afterwards so chances of eating junks again will probably be zero to none. Hahaha