Honestly from what I remember, the speed thing is just a hump. Once you're over it, you're surprised why the fear was there in the first place.
When I first started, I practiced by putt-ing around neighborhoods and parking lots. I realize now that faster speeds equate to smoother riding. 3rd-5th gear feel a lot smoother than 1st or 2nd will. Once I went over 55mph, the fear just disappears and you get used to it.
Just have your fiancé go up to 140mph and 70mph will feel like nothing
