[Steely Tom]

Yes, but that's still not quite the expression.

In the one I'm thinking of, she wears an expression that says oh dear, yet another male making a complete fool of himself for me. As if it's not the first time, and thinks its silly - but, even so, she likes it.

Kind of like the Mona Lisa.

[Pelham]

some publicity stills for Lolita:

http://flashbak.com/sue-lyons-risque-lolita-publicity-photos-1962-48433/