Certain odors DEFINITELY play a part in morning sickness. When I was pregnant with Amy, I couldn't stand the smell of popcorn or Pillsbury sticky buns. The one thing I couldn't get enough of was Arthur Treachers Fish & Chips. I ate there 3-4 times a week (brought along a bottle of Tum).

I was gonna say crackers too. But they obviously haven't helped. The first trimester is the worst. Tell her to hang in there. (I know that's not much consolation.)