Merlin didn't quite jump at the sudden laughter, but it did put him on his guard a little bit; everything about this situation put him on his guard though. He didn't know quite what to say to that comment, so kept his head down and followed Zach through into the kitchen.
As a Seer, Merlin made a lot of his decisions on gut feeling, because his hunches were usually right. In this case, his feeling was that this, that sex between them, would be a yes. Every other part of Merlin was begging no. He'd rarely been conflicted like this before and usually not following his feelings had led to trouble - but this? He just couldn't.
"Yes." He said, then shook his head. "I mean no. I mean... what, was it lasagna you wanted or...?"