Spoiler: 7.16 It could also be an indication that Emily knows it isn't the first kiss Eric & Calleigh share, in that when they do kiss, they are already a couple and would have already shared kisses. I'd like to think that when Eric took her home at the end of All In, that something happened between them, even if it was just a comfort kiss or a kiss good night, a kiss that was more than a friendship kiss. I know someone else said they didn't think Calleigh would kiss in public. Why wouldn't she? Certainly she wouldn't kiss Eric at the lab, but there is no reason why Calleigh wouldn't kiss him anywhere in public. Sure it wouldn't be the kind of kiss that would make people tell them to "get a room", but nothing wrong with a sweet kiss in public. And Calleigh's not so cold or restrained (oh damn, what is the word I am looking for??) that she wouldn't do it.