[Ianto's done this confusion before, when he started sleeping with Jack while Lisa was secretly hooked up to Cyberman life support machines just a few rooms away in the Hub. It doesn't mean he's an expert because it's a terrible thing to be an expert in but what it does mean is that his self-examination will be very different tomorrow. What is it about him that makes him keep doing this, and is it bad or is it just like Jack always says about the limitations of 21st century mentality towards relationships? Maybe he'll never really be able to answer it comfortably. But what he does know is that he likes this, whatever it is and knowing there aren't any easy solutions isn't going to make those feelings go away.
He returns the kiss, long and lingering and sweet. He doesn't want it to end or to get out of here but they do need to. Privacy can't last forever.]
We should probably go before someone walks in. Next time lets do it properly. Bed, romance, everything.