Lancelot at Merlin: Don't worry, I will keep your secret safe.
Merlin: Arthur can NEVER know
Arthur who just walked in: can't know what?
Merlin: erm
Lancelot: nothing nothing. just. Erm..
Arthur: ?
Merlin : alright, you got me. i ruined one of your favorite shirts. *nervous as hell*
Lancelot: yes.... yes. he burned it
Merlin *mouthing*: why
Arthur: ok.... just... buy me a new one? *realization* wait, were you wearing my shirt?
Merlin, honestly confused: no?
Arthur puts a hand on his shoulder: *sighs* Merlin, you are such a bad liar. Do you think I haven't noticed that you keep stealing my old shirts?
Merlin looking at his new scarf: erm.....
Arthur: i know you have a crush on me, Merlin. hell, everyone knows that. That's ok, i'm not mad. i won't fire you over this. I've known for a while and I won't treat you any differently. now go get me a couple new shirts. *leaves*
.....
Merlin, out of ear shot: what?
Lancelot, laughing: i mean.... he's not wrong
Merlin: shut up lance