It was friends birthday night out last night - she had pre-drinks at her house and this included her, me and two other women.
Her boyfriend then joined us about an hour later. One of the women with us (so I was told today) was sat with her legs crossed and then when the bf turned up she sat with legs apart.
I never noticed and I’m pretty certain it wasn’t a re-enactment of Basic Instinct 
But apparently this must mean she’s after the boyfriend.