Does a girl biting her lip during conversation mean anything?

jomu0136536
Like normal, non flirty conversation.. here's the deal, this married woman i think has a huge crush on me.. There are other things that make me think she's crushin.. But i avoid her like the plauge... I don't know why she would want to cheat anyway, her husband seems nice, and i think i look a lot like him, just a little buffer.. But when she's talkin to me she's usually biting her lip when no one else will see.. So is that a for sure sign tho?
Does a girl biting her lip during conversation mean anything?
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