[Hesitates for half a second when he sees him -- unsure, even now, how he should act around him. So it wasn't actually him, before, with Guinevere. And yet, still, she chose him and... and it isn't right for him to be angry and jealous of him, for how Guinevere and Merlin both...]
[He shouldn't focus on that. Underneath the hurt of it all, he... is glad to see Lancelot again. If not for the fact that it'll help Merlin, then just because, despite it all, he does care for Lancelot, issues be damned.]
[Walks to him with a small nod and sits down beside him, quiet for a moment, unsure where to start or even what to say - obviously telling Lancelot about Morgana's plot is out of the question -- and god, that Morgana would do that at all (sob, why does she hate him so much what did he do)]
[..............]
... I know about Merlin. [And his magic. That's about the best place to start, probably. Even though he figures Merlin would have mentioned it to Lancelot at this point.]