First Congrats on the new bike.
It is funny that you mention that she didn't ride 75 miles with you on the ST. When I first got back into bikes after nearly 30 years of being out of them I asked my wife one seat or two she said one seat. As time progressed that changed, I guess I was gone to much. Finally bought the first ST1100 and she started to ride with a little bit, until the point where we were doing week long trips with her on the back.
Then when day in the fall of the year she asked me "Do you always want me on the back?" Well for those of you that are married or in long term relationships, this is know as a hint. The hint is "Oh I want my own bike." Funny how one statement means something completely different.
So that was almost 3 years ago and now she is on her third bike, and she seldom rides as a pillion. All trips planned for 2015 will be on TWO BIKES!!! Oh yes she has also learned how to pack, just not for MC trips but anytime we go somewhere. Motorcycling is such a great educator.
So the moral of the story is "Use a baseball bat as the hint tool. Just come out and say want you want!" After 35 years if you cannot say something to your partner you got an issue. If they or us don't like we will get over it.