Technically, I like the picture. The shadows on her left are a bit 'jarring', but I can live with it given the conditions you were shooting in.
Where I have a problem - and it's probably something that others will think 'makes the picture' - is that to me, candlelight evokes either a somber mood (e.g. church service) or a romantic mood. The smirk on the first girl, and the smile on the second, go against my expectations.
(They do make the picture 'interesting', though.)