And yet that is the information that Optimus finds himself specifically wanting. Honestly, from his angle, none of Megatron's hesitation and personal drama has been obvious. From his side, all if it seemed like a cold, calculated betrayal.

"Reluctant to acquire his prisoner?"

He can at least guess at that, considering that Starscream obviously considered that to be the next move, and it what the Seeker ultimately ended up doing.