There really should be some sort of early warning detection system for pregnant women. It would prevent the sister of said pregnant women from calling and, with no warning, suggesting burritos for dinner. At which point, said pregnant women would have to turn away from the phone to dry heave, leaving her nauseous for at least an hour afterwards.
With such an early warning detection system, the callers would float a trial balloon before commencing with ANY discussion of food, food products, plans for dinner. This will also extend to any discussion of morning sicknes, nausea, or the pregnany in any way.