As a follow-up, so after reading her email, I found it necessary to pick her up a little bit. Not sure if this makes sense. I replied via a short email that I do want her, I want her to be happy, etc.
One last observation is that she did not really apologize for coming home late last night. She wrote, "I am sorry that I disappointed you last night. I just felt like talking to people."
I guess since she has not really apologized for anything or say thank you for anything in months, then maybe I should interpret this as an apology.