She could be stately, but a woman could be tall, thin and stately. However, a portly woman would be hefty as a prerequisite to her possible stateliness. If she hugs people and hands them freshly made pumpkin muffins from her attache case as she grandly parades by at her finest galleon-styled pace, then maybe she's matronly, too.

[*The above was just a little kidding. I am NOT being serious here.]