Barbra Jean and Brock in the TV show Reba.
I'm pretty sure I'm picturing the right people. To me, they're equal in weight, which is quite unusual for TV.
That you would think Barbara Jean is fatter is interesting. It seems that women 10-20 pounds overweight are considered fat, whereas men have to hit a good 30-40, even 50, pounds overweight to be called that. (And I mean "fat" adjusted for gender differences such as muscle weight and bone structure.)
TV viewers get so used to seeing wives who are considerably trimmer than their husbands that the sight of a woman who's similar in size to her husband is jarring.
The bar is set much higher for women. Odd, since women by nature are supposed to have more body fat and men by nature find it easier to lose weight.