How to Get Revenge on a Cheating Ex

Am I really going to kiss my boyfriend's best friend? Yes. Yes, I am. I just found out my boyfriend cheated on me with his best friend's girl. Now his best friend and I have a plan to play them like they played us. There's only one problem. Everyone knows Zack and I can't stand each other. The uptight perfectionist and the slacker bad boy? No one will believe we've suddenly fallen in love. But Zack says we don't need to sell love, just lust. And that, it turns out… That we can do. So I tell him I'm in. I'm down to make my ex pay. His smile turns wicked. "That's my girl." "I'm not your girl," I say. His eyes darken as he wraps an arm around my waist and tugs me close. "You're not his either."