She should ask her OB to refer her to a nutritionist or dietician. I was obese with all 3 of my pregnancies and with very careful food choices, I walked out of the hospital weighing less than I did at the start of the pregnancy. Things are more difficult when severely obese and pregnant but it's not unheard of or even that uncommon. A healthy pregnancy and developing fetus only needs roughly 300-500 additional calories added to the mothers diet after the 12 week mark. Before that, her gestational sac and developing placenta should be more than adequate to nourish her baby. Those calories can easily come from an extra yogurt, some cottage cheese, or other small, healthy snacks throughout the day that will help keep her blood sugars nice and level as well as help her resist the need to eat everything in sight.
Goal 1: 214 lbs. Met!! Goal 2: 197 lbs. Met!! Goal 3: Keep getting healthy in 2013