Sir, worrying about the health of your wife and unborn children is is no way being a pain in the ass, as you put it. It's being human. And all the replies you see here should tell you how much we love Ali, and worry the same.
BTW, I just got off the telephone with my dietician. She says that any diet You and Ali decide upon should be based upon her doctor's recommendation from evaluating her blood tests. There are many myths out there concerning all sorts of diets (low-carb, no-carb, no-meat, no vegetables and many others.) I informed her that putting weight on was what you were looking for.
Again, she insists upon the doctor's recommendation. The tolerance levels in everybody are not the same. She does agree that Ali is too light right now and needs some extra weight to support the babies, but she will not give advice to someone who is not her patient that she is unfamiliar with the situation. I wish I could tell you more.