This is how Megatron talks to Orion and Nightfall goes in Orion Pax and Nightfall Twinkle Part 2.
Megatron: Orion and Nightfall. I am so sorry for the recent commotion. You were not in any way harmed, were you?
Orion Pax: No, Lord Megatron. But why did you tell us Starscream was dead?
Nightfall Twinkle: Yeah. Why would you tell us that?
Megatron: Because he is dead to our Cause. You see, Starscream was my most trusted lieutenant. Until he turned traitor and joined the Autobots. Never have I witnessed a more profound act of deceit. He did not do or say anything troubling to you?
Orion Pax: No.
Nightfall Twinkle: Uh-uh.
Megatron: Good. Perhaps it is best to forget the entire incident and return to your project.
Orion Pax: As you wish, my Lord.
Nightfall Twinkle: Yeah. What he said.