Your mom is not doing her job, which is to say "You're doing your best for the baby, so he's sure to be fine."

Seriously, babies show up with their own opinions and preferences OUT OF THE WOMB, and delusions of control are just that, delusions. If you have an angel baby your are lucky. If you have a cranky baby, you are unlucky. I had one of each. Same woman; mostly the same parenting practices, modulo having another child; different roll of the dice.