Today when I was walking towards the office and right before I got there my coworker went into the office?

I was wondering why she always does this. She has done this before, whenI would be in the office talking to my supervisor she would come in or when we’re I’m in the kitchen talking to her she has to come over and interrupt.

Today when I was walking towards the office and right before I got there my coworker went into the office?
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