I have to wonder if you and your wife are habitual tailgaters. When people tailgate other vehicles, they inevitably have to keep hitting the brake much more often than if they followed the Three Second Rule:
The 3-second Following Distance Rule - Driver’s Ed Guru
Even if you don’t think that you are habitually tailgating, if you don’t follow the Three Second Rule, then you probably are doing it.
If you definitely don’t habitually tailgate other vehicles, then I think new calipers should be on your agenda.