The pants idea is just right. You'd probably have either soft elastic or a drawstring that could be adjusted as her stomach expands. Of course, I have seen a few pregnant women wearing dresses just about that short as well so you could have a combo outfit--throw in some shorts and she's set for the day. I agree that you really have captured the morph--excellent work. If you're looking for a next project, I'd really like to have a some nice older body and facial morphs 50s-60s.

"Democracy is a pathetic belief in the collective wisdom of individual ignorance." - H. L. Mencken