"I'm not certain what use it is to have such a scale," Lancelot says, carefully. "I also am not in the habit of discussing what goes on between myself and a partner, except with those partners."

He is aware that this is a non-answer.

If there's a bit of a warning tone, he can't really help it. He thinks back to Magnus asking Have you had your affair with the queen yet? -- the old impulse to keep silent is still with him, even though he's been fairly open about his affections and connections here.