One of the things in my anger letter to my mom that brought all this up was that I love dogs but wouldn't adopt one because I know that I couldn't provide for their needs at this point in my life and it wouldn't be fair to the dog.
She's said she "was never meant to be a mother" more than once. She and I have that in common.
I have no desire to have kids, but even if I did I'd know it would be cruel to create a child knowing that I couldn't be a good mother.