Brooks seats arent the end all and it may not be the right choice for your wife. There are many many good bike seats out there for women, Terry seats come to mind (I got one for my daughter some years back and for both her and my wife, it works very well). Brooks shouldnt be left out in the rain etc, so this may be factor that doesnt make it a good choice.

same with Tubus racks, depending on how much your wife ends up carrying on her bike, a good solidly made aluminum rack that is reasonably priced can and will work perfectly well for your wifes bike.

in other words, you could save yourself 100's of dollars on these items and still put perfectly good, functional equipment on her bike--and could put that money into other bits and bobs of either bike parts, or camping stuff or whatever.

this comes from someone who loves my Brooks seats, and now has some Tubus racks, but have toured and commuted for decades on mid priced, well made alu racks that have held up perfectly well after tens of thousands of kms of use.