"I only know what you've told me, cream cake." It takes him a moment, but he retraces the conversation to Venia saying he's in love with her. Then it clicks. Venia was talking about him and the TARDIS but she thought he meant the Doc and her.

"Oh ho. I get it now." He wags a finger at her, pleased with finding out this particular bit of information. "You and the Doc were shacking up. Honestly, I didn't pin you down as his type." He pauses a moment in consideration, then raises his eyebrows at her. "I wasn't sure that he had a type."