If she has learned anything in her years (Merlin, years!) on the road, accompanied by people with different magical abilities and skills, it's that not everything has to be exactly the same as hers to be good.

She is trying to be reasonable here, because Ness is her friend. And Ness was faced with desperate times calling for desperate measures.

"I think I would've, because I would prefer to simply talk things out, if you have any questions for me. But when it happened, when we were down there - honestly, given the circumstances, I wasn't mad at all. More than anything, relieved that you could find a way to communicate with me."

A beat. "And more than a little impressed."