First of all, excellent news, Zig. Glad all is well.
Now, the kiss. I've had a chance to think more about this when I should have been teaching Y9. (Yep, school's back. Great.)
I think we could see all of the kisses throughout the season. I reckon it'll start with a hello/goodbye peck in one of the first couple of episodes, so as not to shock everyone. (Apparently, not everyone is a GSR Fan... can you believe that!?) Then I believe they will escalate over the series, on to a gentle kiss, passionate, full on then OMG. The writers gave us the relationship in bite size chunks, so I reckon the kisses could well be the same. However, it will be an escalation.
The looks and little touches will give them away to us, but not the CSI's.
I hope Brass finds out first, perhaps with Doc Robbins. As Grissom's peers they can tease him effectively and joke about it with him and he won't feel uncomfortable. Maybe even Sara would join in with them, as they are reliable and gentle and she could take it from them as well.
I think the mickey taking from her peers, Nick, Greg, Warrick and the only other female CSI, Cath, could be relentless and freak them out. Furthermore, their conversations would take place in areas where they could be overheard - the lab and the breakroom. Brass and the Doc are either at a scene, where Grissom is usually the first there, or the morgue, where Doc Robbins hangs out. These conversations would be more private.
Just a thought...