Starscream looks downright outraged at that implication -- maybe more than he should, but he has just been talking about his Megatron's weird hangups over Orion, and maybe he's feeling just a little bit sensitive, but he'll admit any of that over his dead body, so, yeah. Indignant outrage is the way to go.

"No, in fact," he says through his teeth, "my relationship with Megatron is just fine. More than fine, actually. Which is why I'd much rather get back to him -- and my Cybertron -- as soon as possible, rather than endure your company any longer than necessary."