I still think it is worth telling the OP that I rode my wife around a few miles on my Savage when we first got it. Our combined weight is more than your wife and yourself.
I can say with confidence that the Savage WILL pull the
two of you around, and accelerate safely to speed. But as others have said: I wouldn't want to ride in that position for a long time.
Legit question on the floor:
Paraphrased: What is good or wrong with an older bike with low mileage? I feel partially qualified to answer that question, because I've bought cycles more than a couple of years old, which had very few miles on them several times. Two examples with varying results:
Early 90s I bought a 1978 Yamaha XS-650 Special from an old man who admitted he rode it very little every year, and that most of the 5000 miles on it had been put on it in the first couple of years by the first adult owner. Old guy said he changed the oil every spring and charged the battery and it would run fine.
The bike ran great for me, but every o-ring and oil seal leaked like a sieve. After I spent a day or so changing o-rings and seals it was a great bike. Ended up buying a cheap battery for it within weeks because it wouldn't hold a charge. Wish I still had that bike.
The 1987 (nearly 20 YO) Savage I bought a few months ago had a similar history. Or so I thought... But it appears that owner #2 on this bike rode it enough each year, and started it through the winters, so it didn't even have any oil leaks, until well after I got it

Also, the old man apparently just went through the fuel system for rust and contaminants before I got it, but that happens at a certain age regardless of mileage. Also the tires on my '87 were weather cracked upon examination with a magnifying glass. So... my overall experience with buying older low mileage cycles has been positive. Just be sure and check for:
(1) Rust, especially in the fuel system.
(2) Check for leaks when the bike is completely warmed from a ride.
(3)Rubber and vinyl will deteriorate from extended periods of no lube from lack of use, so expect to replace those parts depending on just how neglected they have been.