Colie and Cory have sex upon his arrival in Denver, as do a drunken Jenn and Alex. Brooke, annoyed at the lovemaking going on in her bedroom, calls her mother, who advises her to address issues of conflict right away before they escalate. Jenn and Brooke make amends over their prior conflict. Ty advises Colie that she would be better off by not trying to be with Alex. After Cory returns home, he calls her and breaks up with her because he feels he was holding her back from enjoying other relationships (thetvdb.com)