Colby makes a great point. I've done a few centuries. While I was training for the last one, I found myself saying "I hate this I hate this" over and over. Out loud, while I was riding. Now I do 2-3 metrics per year and otherwise stick to shorter rides and I'm really happy with it. If someday I decide I no longer like 50-60 mile rides, so be it.

Veronica, I hope your SIL is okay.