Unless you plan on losing her as your touring partner, that pace is WAY too much. I trained for 2-3 months before my first short tour like that, and I was a bit tired after only averaging ~60 miles a day. A bike tour is supposed to be fun, not a race. On my upcoming month long tour, I plan to ride only about 50 miles a day on average. Give you time too see cool stuff!
If you can stretch this tour out a few days, do it. If you included the weekends in front and behind your week as well, it moves it down to like 60 something miles a day, which is much more manageable.