re: Anyone else had this problem after first child born?

How old are yall? Who really knows what's going through her mind, could be depression of being labelled a mother, could be overprotection of the baby, could be depressed about her appearance (gained weight).
you need to step up and create activities. Say, you're going to the park for a picnic with Junior. If she refuses to go, insist that you will take junior by yourself. See if she stays home alone or will go with you.
I don't know what your places to go were, perhaps thet aren't baby appropriate, but if they are, go there for an afternoon with Junior.