Hi N.,
What I can suggest is this, try saltines and ginger ale. Keep literal packages by the bed and eat some before she even sits up, this will help a little, first thing in the morning. Tell her to try to stay away from milk or orange juice first thing too. Milk just is icky to bring back up and o.j. is a little too acidy. Stick with bland foods at first, and maybe chicken noodle soup. They have things called sea bands, that you put on your wrist that help with morning sickness, motion sickness and sea sickness. From what I have read on here, these have worked miracles for some people. If all this fails, have her mention it to her doctor, who can give her medication. One more thing, tell her not to eat three big meals, but snack lightly throughout the day. This will help a lot! Tell her good luck!