'I don't know how he knew!' Cass said, not at all liking the idea that his own reactions could have told Rodolphus more than he'd known from the start. His head was suddenly pounding with pain, and he wanted to push it all way, yet he knew he couldn't.
'All I know was that all of a sudden I was asked to spy on you to save her, and I couldn't do that. I just wanted you away from me, because away from me meant safe - or at least safer.'
'Please, Percy, you don't have to like what I did, Merlin knows I hate the fact that I hurt you like that, but-' He swallowed, trying to find the words that wouldn't make him sound as a liar, but realising that he wouldn't find them. 'I never fucked her. I never meant to fuck her - or anyone. I just...I wanted you to stop trusting me, and I couldn't think of another way to do it than to make you think that I was cheating on you.'