Alligator River
1) Abigail: Abigail is the worse character in this story. I understand why she did what she did to see Gregory but to take pleasure in seeing Gregory get his ass beat just because he didn't agree with what she did is just plain cruel. Of course you're going to get upset if someone you love slept with another person so Abigail could've looked at her decision from Gregory's point of view and try to understand why he casted her aside but she had to get all butthurt and snitch on him even though Gregory didn't do anything wrong.
2) Slug: Slug, in my opinion wanted to be the Hero for Abigail but like in a sexual way. It is mentioned in the story that Slug felt compassion for Abigail. I guess he saw Gregory as a splinter in Abigail's finger. As soon as Slug takes Gregory out, then nobody will be in the way for Slug to get at Abigail. Also, Slug doesn't have any part in Abigail's and Gregory's business, it wasn't his decision to make to beat up Gregory. I know that Abigail didn't tell him to directly beat Gregory up, she just told him about her messed up situation. It was HIS decision to seek Gregory out and mess him up.
3) Sinbad: Sinbad is just a horny businessman. He left the option to Abigail to decide. The deal was basically sex=river trip to your lover or no sex=BYE. Even though he let Abigail decide, it's still disgusting and wrong to take advantage of people who are love-sick vulnerable. After Abigail and Sinbad slept with each other, he probably shook her hand and said, "NICE doing business with you". God, what a sick man.
4) Gregory: Gregory didn't really do anything wrong in this story except not listening or try to understand Abigail's side of the situation. After Abigail admitted to sleeping with another man, he immediately casted her away without even hearing her reasoning. Kinda like my mom when she's lecturing me.
5) Ivan: Ivan didn't do anything wrong. Abigail simply vented to him about her situation asked for his help. Even though they're friends in the story, it was still his decision whether or not to help her. It was just his decision to say no. I could understand being in his shoes. He probably wanted to prevent making the situation even more worse by being an instigator or he just didn't want to get into their business.