"Ah poor Gwen, doomed to kiss no one but Arthur ever again," Gwaine said, teasing after Gwen had given Arthur a quick goodbye peck before their patrol.
"Shut up, Gwaine," Arthur said.
"Yes, do shut up, I don't want to think about who my sister is kissing," Elyan said.
"Arthur is a wonderful kisser," Gwen said, teasing. She grinned at the wretching sound Elyan made.
"Yes, well, you know what they say, you never forget your first!" Arthur said, looking proud of himself.
"My first what?" Gwen asked.
"Your first kiss, of course! I was your first!"
Gwen froze momentarily, and behind Arthur's back Merlin froze as well. He glanced up at Gwen, whose eyes flicked to him like lightning then back to her husbands face.
"What is it?" Arthur asked flatly, noticing something was wrong. "Wasn't I your first kiss?"
"Nothing! Of course you were!" Gwen said, eyes flicking back to Merlin to see him shaking his head rapidly. This time Arthur followed her gaze and saw Merlin shaking his head.
Leon and Gwaine had already connected the dots and were gaping between the two of them. Elyan was wide eyed, and Percival looked to be on the brink of realizing himself.
"What?" Arthur asked, in denial. "You don't mean…"
"Of course not!" Merlin answered, too quickly.
"Oh my God," Elyan said.
"You don't mean," Arthur started.
"Of course not!" Gwen lied, making soothing hand gestures at Arthur.
"You're lying! The both of you are lying right now! You kissed my wife?" Arthur snapped, whirling on Merlin.
"No! She kissed me! And she wasn't your wife then! It wasn't long after I first moved to Camelot!"
"Oh Arthur, it's no big deal, I thought he'd just died! His heart stopped and Giaus and I thought he was gone!"
"I can't believe you kissed Merlin! I can't believe you kissed my wife before I did!"
"Well it's not like we knew she was going to marry you then!"
"Merlin! I never knew you were such a stag!" Gwaine said, throwing his arms wide and grinning.
"I am not! It happened one time! It doesn't matter!"
"It matters!" Arthur replied indignantly.
Gwen looked caught between amusement and concern for Merlin's safety.
