Here's a picture of Katie yesterday. That clearly looks like a pillow. Standard size. Plus she shoved it up too high, her flat abs below are giving away the whole sham (pun intended). Photo source: Just Jared.
Here's a picture of Katie a couple days ago, with a very unusual bump. She really screwed up the pillow arrangment today. I have never seen a pregnant lady with a bump that was perpendicular to the floor.
Trent, from Pink is the New Blog, had the best explanation of why her bump looked so wrong this day. She stuffed a basketball under her shirt.