Yes. Often when you have a baby your relationship with your spouse changes. He is seeing you as 'mommy' to his son now. Are you breast feeding? Are you spending any time alone with just your husband?
You two should go out alone together if you can and establish that you are still a woman, with or without a child.
Having a baby wreaks havoc on your sex life!
Seeing a baby come out of 'his' area can be frightening for a man, whether they admit it or not. You need to adjust to being a family.
;) it will all work out eventually.