if your wife is riding topless I`d cover her in lots of sunscreen!
My ex and I took a trip from Stockholm to Rome, Marseilles, Arles, Paris, on a 5 week trip, when we were engaged (1967)....top was only up while parked ,over nighting...great trip! have fun!
and if she has long hair , dont let her fall asleep while no hat on , while driving! ....my ex took 2 hrs getting her hair unknotted!!!