I like it both ways. Sometimes the trophy wife fattens up her older husband. I think it's a way of keeping him.
A good example of the other way is Pierce Brosnan and his wife Keely Shaye Smith. She is pretty plump and he seems pretty happy. Although as he has gotten older I think maybe her eating habits have rubbed off as he has grown a belly and is no longer in Bond shape.
http://www.msn.com/en-nz/entertainment/celebrity/pierce-brosnan-64-and-his-wife-keely-shaye-smith-53-enjoy-a-day-on-the-beach-in-sardinia/ar-BBCJ9ax?li=BBqd5YP