http://www.rush.edu/rumc/page-1108048103230.html
Just for educational purposes - the ideal weight range for a 5'6"tall female is between 126 and 143 pounds. Of course body type and age play into maintaining weight within the ideal range. For me, I know when I'm looking at someone who is overweight though even though I may not know the number. So I would describe a person to police as chubby or apple shaped or ample but not use obese unless they were, etc. That would be more helpful imo. Nobody can look at a person from afar and tell their exact height and weight.
If it turns out the perp isn't the wife, the fact that she appears overweight imo may be what saves her from immediate persecution. And, that may be a first!
Of course, I'd like to know whether or not we're looking at a current picture/video.
Also I'm only posting my immediate response to what I read and see because something didn't ring true to me and crossed my mind.