My married co-worker gets jealous when I talk to other women and we’re not even together?

My married co-worker gets jealous when I talk to other women and we’re not even together. Today, I was having a conversation with another female she walked up close behind me popped her head over my shoulder and joined the conversation. I then walked to canteen with her to grab a coffee and as a joke I said I don’t feel like one anymore and she looked at me and said please come for a coffee. I don’t know what to make of this. Is she in love with me or something?
Updates
+1 y
No, I’m not. I’m going to walk away and avoid her.
Updates
+1 y
Doubt it. I’m off to Seattle for a month next week with my fiancée.
My married co-worker gets jealous when I talk to other women and we’re not even together?
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