My son enjoyed his new stories being read to him.
Has he always enjoyed being read to?
I don't think so. But I hope he likes these new stories more than the other ones.
It's nice that your son likes having the new stories read to him, because it's great to read to your kids. Reading to kids can not only help them learn to read themselves, but also help their imagination, and is a great way to bond.
This is the first time I've read to him. His mother usually does it.
I think it's great that you're reading to him, and you should continue to do it. I'm sure he loves being read to.