Payback's A Bitch

Summary: What if Nathan and Brooke walked in on Lucas and Peyton mid make-out session instead of Haley? Timelines are mixed together. It is set when Lucas was cheating on Brooke with Peyton, but Haley left for tour and Nathan said that if she left it was over. Nathan/Brooke (Brathan) Mentions of Brooke/Lucas (Brucas) and Minor Lucas/Peyton (Leyton) Mentions of Peyton/Nathan.