Women are experts at body language Quattro, men less so. If a woman wants a kiss to turn into something more (maybe not there and then, so steady on!) she will put her hands on your arms or shoulders, maybe linger a little longer, that sort of indication. If not, don't worry about a kiss being on the lips - it is a traditional greeting, and usually means nothing more than that. If you are unsure, move gently towards the lady's cheek, and if she turns towards you, she is indicating that a kiss on the lips is OK, if nothing further is meant, kiss briefly, and move away, no harm done. It really is something you need to assess on an individual basis, but remember, no-one lost their dignity by moving too slowly, so take your time, and read the signs.