[45M] Office flirt [45F] or is there something deeper?

I have been working closely with a female colleague in the same office for over five years. We've shared lunches and traveled for work together, and while we had a good working relationship, I never gave it much thought. She’s married with two small children, and I’m in a relationship myself. At the last Christmas party, I had to travel for work. Since she was involved in organizing the event, I apologized in advance for my absence before the festivities began. She responded by saying not to worry, suggesting that there were better places for the two of us to meet. I found it strange but playfully said I might take her up on that invite someday. Last week was my final day at the company. We exchanged friendly words, and while she attempted to hug me, I opted for a handshake instead. She then asked when we could meet again and suggested visiting me at my new workplace. I inquired if her husband would be okay with it, and she assured me she would maintain a professional distance. Since I started my new job, she has been texting me with basic administrative questions—ones I assumed she already knew the answers to, given that she manages the project. I wonder if she’s trying to keep the lines of communication open. Honestly, the comment she made at the Christmas party shifted my perspective on our relationship and made me question whether there was an underlying spark I hadn’t recognized. I’m content with my current situation, but I don’t know much about hers. What does the community think? Am I overanalyzing this, or is she genuinely seeking something more?