Did Peyton ever find out abt Lucas & Brooke hooking up after Lucas&peyton brook up wen Peyton was in LA. brooke zei something abt during a concert episode

I was wondering the same, but I don´t think so, because it doesn´t happen that much. Brooke had enogh self respect to push Lucas away. Beside that, Mark tried everything to let people forget that Brucas did exist.