Girls, when you fiddle and play with jewelry, are you nervous or flirty?

My girl sometimes plays with her necklace when taking to people, and she did it with my 54 old co worker last night who isn’t attractive at all. I thought it was signs she was physically attracted to someone, but after last night, I think it has to do with her being introverted and nervous around meeting my coworkers.
Girls, when you fiddle and play with jewelry, are you nervous or flirty?
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