Selfish or Selfless?

What I want to do today is go to the gym. What I will do instead is take T to storytime. I can't do both because of her nap. I tell myself a few things: One day she will be in school and going to storytime won't even be an option, she's only this young once. And also I think back to the period of time with my recurrent miscarriages and that I had plenty of time to go to the gym, but no baby to take to storytime. Yes, we're going to storytime today.