Gwaine is jealous
Gwaine was sitting in his favourite chair watching the barmaid Mel serve the newest knight; Limner. He was seething as he saw her flirting. He didn't realise what he had done until he saw the new knight clutching a broken, bloody nose.
'Gwaine, what do you think you're doing' a familiar voice shouted.
Smiling and only a little bit drunk he turned around to face Arthur and said 'well Princess I don't think I'm doing anything at the moment but that knight has a wife and he was flirting'. And with that he walked away leaving behind a confused Prince.