Reading between the lines, you don’t want her riding and that’s okee dokee. Pull the pin before you spend any more dosh. But if she wants to, and you really take the time, start softly, and maybe get her some coaching, you may end up sharing a passion for the same sport.
My wife is my riding partner. Every weekend, every day off, every holiday ... whether in Oz or overseas, involves mountain bike riding. She’s always had good bikes, often better than mine, and other than magpies, she rides all year round. But she is fit as fuck... runs, swims and rides, so that helps.
But, we are mates, and want the time together, and that’s really the crux of the matter. Do you want that?