Not bad, but I'm wondering what the stakes are. Like, I'm not sure what the objective here is rather than "just" talking. Do you love him? Hate him? Besides the words of the monologue, what are you trying to say? I would say, think about each line and verb your script. Who are you talking to and how are you trying to effect them? - Hope this helps!
Terrible. The character of Mabel Chiltern is not shown AT ALL in this performance. It was flat and emotionless. People reading the news change their voices more than this woman did.