I agree with Stapfam and will add just a bit. I hope this is your wife’s idea and that she hasn’t felt pressured into it. If it is her idea then N+1 is a real possibility.
When I got back into cycling I was 60 pounds heavier and I went for a pure comfort bike. Giant Revive LX. Because it was so comfortable to ride I rode it every day. After a few months I got a MTB but I still rode my comfort bike every day and once in a while I rode the MTB on Saturday. I started riding some club rides with the trike and bent riders and after about 6 months I got a road bike. I built my first road bike a few months later. I could just as easily have gone to the MTB side but there is still N+1 and now my wife is riding as well. On a comfort bike.