Talk:Lamia (episode)/@comment-124.13.130.58-20151216020310/@comment-5674726-20151217214227

''Oh, if only Gwen knew. I would've prefer it if she knew. They're best friends. She would've protected his secret no matter what, just like Lancelot, *sniff*. Perhaps even from Arthur.''

I doubt that Merlin would have wanted to put her in that position. I'd say that he didn't like deceiving Arthur so he wouldn't have wanted Gwen to have to choose between protecting his secret and keeping a secret from the man she loved.