['Had lied, is still lying' is an apt description of it. Given that it's Seimei, that part isn't likely to change.

Nisei's emotions disengage again from the conversation, like a fish undulating lazily into deeper water. This lets him think about what you're saying without distractions. His expression doesn't change.]

Then ... why don't you tell him? If you're willing to give up everything, what do you hesitate to lose?