flurtive
Creating affectionate physical contact between boy and girl to indicate attraction but obscuring ones intentions so as to appear an accident.
'John reached over for his pint in a flurtive manner, lightly brushing arms with Laura...'
or
'Jenny knew the best way to get Mark's attention was to act flurtive and rub her tits against his arm as he walked past..'
or
'Jenny knew the best way to get Mark's attention was to act flurtive and rub her tits against his arm as he walked past..'