"I see something is wrong"
"yes, master" you say while you pull out your lightsaber and
put it at his throat. You are a liar and need to be put away.
"No, Darth Bagawan. I trained you, taught you everything I now
and now you betray me?"
"I was never with you, and now the Jedi know all of the sith's
ways." Then you finish him off. The sith's will never again
live!
When you go back to Darth sideous, He senses a change in you.