The Doctor decided to let Seclusion explain about the locket. He knew that she would know more about it and what to say. He hoped they could trick the Sithleen and capture them, The plan did seem like a good one. He also had to hope that they didn't find out what Seclusion was.
He was looking at the Sithleen. "Of course." He stated when the asked the two of them to go with. He knew that once he had them in a position they couldn't escape easily from, he could captured them. He hoped that Jack was recovering much better now he was resting.
Jack had barely moved and was still trying to get some rest.