Cool story bro. As the Childfree Aunt, I'm fully aware that reading a book to a baby is both important and the easiest, most enjoyable caretaking task - one you can assign to someone who knows absolutely nothing about babies.
I don't believe for a second he's doing any baby feeding or cuddling.
I think the worst part of this is in a follow-up tweet too. Determined that reading to your baby is something you "don't need to be around for".
Some of my favorite moments with my girls have been sitting in our bed reading books. It's such a sweet, fun, and easy bonding time.