Unfortunately, Williams tainted her well-worded defense of Tiegen by bringing up her post-baby weight. "Number two," Williams said, "How'd she get her belly so flat in just nine days?" While this is obviously intended to be a compliment to the supermodel, it's not encouraging to see Williams draw attention to the one thing women shouldn't have to worry about in the days after giving life to a tiny human. New moms have enough to worry about, and a flat belly shouldn't be one of them.