Flirting

A woman I work with flirts with me, but I don't think she is doing it intentionally?

A happily married woman that works for me who often talks about her kids and seems like a good mother plays with her necklace, shows her elbows, tilts her head and half smirks and talks in a high pitch voice around me... Is she sub-conciously flirting? Is there such a thing? I don't want to pursue anything but I am tempted to fake-flirt back. I read up on it just to see how she responds... it won't be from the heart and probably very mechanical but I think it would be interesting to interact and play along-lol. I have 20 days left here so I have nothing to lose. It's one for the personal memory bank.
Yes, they cheat and I have proof
No, they are always faithful and never ever sleep around
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A woman I work with flirts with me, but I don't think she is doing it intentionally?
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