Slammed (The slammed romance series #1)

Evelyn has been in college for eight weeks, keeping her nose to the grindstone and thinking of nothing but making sure she maintains her GPA to qualify for scholarships; her roommate convinces her against her will to go to a party at the notorious frat that houses the members with the worst reputation--and it's there that she runs into her high school ex, Zack.

Although she tries to avoid falling into the trap of his charms, Zack lures her and she finds herself in his arms once more; only to discover that their reunion wasn't as important to him as it was to her.