It is “normal” to be tired. It is normal to be “excited” and a bit “spacey” because you are always thinking about your spouse and what to cook for him, and you just always have him on your mind because you want to be with him.
On the other hand, if she is so spaced out but she doesn’t have that happy look on her face when she is, that is NOT a good sign and I too would be concerned. I would ask her “What’s wrong? Are you tired, does your husband help you?” that might open up some discussion? Ask her what its like being married, ask her how different it is being on her own than being at home. See if she smiles when she talks about her marriage or she gets nervous. That should give you a clue.