The 'Tour was reasonably quick, 4-door, had leather, a/c, tinted windows, a nice stereo system (high-end replacement speaker and a deck), it looked sharp and the only time it really made any noise was when opening up the throttle.
On the other hand, the Mustang has an unrefined, turbocharged 306. The interior is currently partially gutted while customizing, it squeaks and rattles, the ride is harsher than the 'Tour with Koni's on full, the aforementioned engine is loud all the time, it has Hunsaker sport seats, she knows that at some point in the next couple years getting in will be like playing on a jungle gym, and the Mustang is stupid fast for the street so she worries.
Hopefully, she will like the Mustang someday, but I am not holding my breath.