Hi ahwiles,
It sounds like good advice, she already has three bikes, one a specialised MTB, which she hates, an electric bike which she loves, but would be difficult to charge, she also has a kona Africa bike for scooting about on, but it is exactly the right shape and size for her, but heavy, crap brakes and no gears.
She was a super cyclist, but cancer took it right out of her, hence the electric bike.
She can ride with me and see that better bikes ( I have a few) are so much easier to ride, better gears and frames.
I should point out she is German, and is no spring chicken, so has some quite strong views on this!
Before our lives changed we had spent many weekends away together and slept in bivvy bags, so no biggy for her.
We will probably start again easy, with a train down to the west country and follow our nose like before.
The gazelle already has a too far forward stem, and will cause her discomfort, she wants to sit on her sit bones upright.
I wondered whether the cube bike in my link with a taller steerer and shorter stem, with say some Jones bars, would be a nightmare to ride?