A short collection.
3 stories. 2 different girls. Both cheaters. This is what happens when you don't pay your hot girlfriend enough attention. She gets bored, and Brian Cocksure and his buddy Eric know exactly what to do with her. It's a little late for you to make up for it now, but you can read all about their escapades in this book.
Cheating and NTR and lots and lots of hurt feelings.