I don't mean to sound superficial or anything, but unless his wife has a medical condition or what not, there is no reason she should have let that much weight be put on her with Troy Aikman as her husband. It's not like she's hurting for money or needs to work a day job to support the kids, and so doesn't have enough time. The one thing she could do is maintain her physical stature, at least after having kids.
And yes, I would feel the same way if the tables were turned, and a man was married to a "sugar momma" so to speak, so I'm not trying to be implicitly sexist.
If part of the reason you were married was due to physical attraction based on physique, I would assume that both parties would try to maintain that as much as possible except for reasons that are beyond one's control, i.e. age, etc.