I was adopted & raised by my grandmother, and I seriously don't know how she did it. She had disabilities and with her age, I give her so much credit.
My back and shoulder are bothering me, and trying to get a thrashing toddler in the carseat 3x today has pretty much worn me out. I can't imagine trying to take care of kids with any physical issues or in older age!! Can you imagine raising kids in your 60's by yourself?!