I'm hoping that in some way Bill finds out, like maybe Fleur is trying to get on Percy's good side again and Percy calls her a slut and say he was the fool for believing her and he was used, which he was. And Bill hears enough to understand what happened. Of course he'll be angry at Percy, but I think Bill will be stupid enough to stand by Fleur and her veela charms. Percy was all blaming himself if Bill ever found out, when in fact Fleur created a bigger wedge between Percy and the family than what Percy ever did. He never knew her nefarious plans. Haha, I think you're actually getting me to sympathize with Percy even more, even though he was a traitor to his family for a while.