If you ask Muffin who his Mommy is, he will tell him that he has 2 mommies.
"Big Mommy" which is me and "Small Mommy" which is Jordan.
There was a period of time where he would go round the house hollering for Mommy and when I replied, he would chide "Not you, Mommy. Small Mommy. You, Big Mommy."
But I am thankful. She picks up the slack for me. And gives me quite a breather at times.
She succeeds in feeding him when we fail to and she plays with him in the morning when I am begging for another 5 or 10 minutes of sleep.
It's useful to have 2 mommies in the house, even if the other one is 6 years old and sometimes, not the most reliable. But her heart is in the right place and she does a pretty good job standing in for me.