I was on OTHforums when someone asked about the Brucas（ブルック＆ルーカス） break up and I realized I've got so much to say about it.
Brooke on Peyton.
If I remember it correctly: 1] Peyton told Brooke about her feelings for Lucas 2] Brooke found out about the としょうかん, ライブラリ kiss
Peyton telling Brooke about her feelings has a big effect on the Brucas（ブルック＆ルーカス） break up. Brooke could have forgiven the としょうかん, ライブラリ kiss, she could've chosen to believe that it was innocent, but あなた cannot do that if あなた know that Peyton has feelings for Lucas. I know in the Leyton timeline it isn't like that, but in Brooke's it was. Anyone in Brooke's place...