[Pfft, he's not selfish. She's here, she doesn't mind. Ponders on that for a moment] I don't think there's much to say. Yuuri trusts you, he'll understand if you choose to tell him what happened. If not...tell him you made a mistake. You were deceived and against something you couldn't hope to beat. But no matter what, you're still going to help him.
[A comfort for Yuuri perhaps, once Conrad's healed. And not a lie to say, just omitting parts that are painful to say]