You haven't shared your email to her but it was likely more a warm and friendly communication to a close friend regarding your personal relationship with her and her family.
Her entire message back to you is about JW activities and behavior. Perhaps due to translation, it seems to be a cold reply. She also does not appear to continue to consider you a close friend as she said: "Let's become close friends encouraging each other!"
Once I stopped JW attendance, I found there is little in common to talk with JWs about including family, as they seem lost if not talking about anything other than JW meetings and service activities, people at their hall, their vacation plans and what they watch on TV.