Leinad,
You are at a place where demands on your life are diminished. Both you and your wife have taken riding a bicycle to another level and are doing it together. More power to the both of you! Enjoy and savor the moment. If your interest and passion in riding faster and longer lingers then pursue it until your heart's no longer in it.
Last summer both my grown boys were riding road bikes and lived locally. They would both ride on our local group rides and I even got to do several races with them. Life's pathway includes changes, one son now teaches in Columbus and the other has entered grad school for the next year. I don't know if I will ever be able to ride with them like last summer but I will always have the memories. My commitment to riding is also balanced into my wife's life and around our other interest even though my dedication to the activity is paramount.