When I got my wife back into riding I had to "re-train" her. She apparently learned to ride mashing - always, and would wear out with knee pain after 5 miles. She a spinner now, and we do 35 mile rides together with no drama.
She also rides with one of those giant Giant "Silk" saddles; looks like something you'd put on a horse. But she loves it, and she's not changing.
One out of two isn't bad.