I wrote it long ago, the guy Emily cheated on the MC with is the guy we meet at Hoco, the one surprised that the MC and Emily are back together, now I don't remember the name. And I'm convinced that when we leave Emily in the bathroom, he joined her. The girl at parties drinks and when she does it she cheats, simple, for me there are no problems, I will avoid that path, after all I wanted to deepen Emily for a morbid curiosity about cheating, for now Aubrey and Penelope are my favorites.
I think Riley is going to tell MC that she loves him or that he likes him, I don't think she saw emily cheating on him. But there's the message Riley sends to the MC in the morning when he asks if he's back with Emily, which makes me questionable, could Riley know anything about Emily? About betrayal or something else?