Ianto shrugged, and smiled back. "I guess I am. Staying, I mean." He replied. Not that he would've been none the wiser if he went home, apparently he wouldn't remember this in the first place, but there was a sense that things back home wouldn't change without him which was a relief. He was happy. One hand going to Jack's shoulder, he pressed back into the kiss. Brief as it were, he let it do the talking for him.

He pulled back slightly. "Thank you." He looked from Mercy to Jack. He didn't need to smell emotions, because he was rather good at reading them on his own, being a master of hiding them.