User blog comment:Dryuuu/Why didn't Morgana tell Uther about Merlin poisoning her.../@comment-4135736-20120316124242

I suppose the reason why Morgana didn't tell Uther about Merlin poisoning her was because of several reasons e.g. she either feared that Merlin would convince Arthur of her betrayal (the most likely reason), she wanted to kill him herself or let Morgause finish him and she possibly remembered the days when she and Merlin were friends (the most unlikely reason). I do agree with you, she had that opportunity to get rid of Merlin (just like she had several opportunities to learn of his alter ego Emrys as well as his magic) but due to one or some of the reasons I mentioned, hesitated to do that.