For what it's worth, what I make of this:
1. "I told her not to." Cherry in the woods with the summoned monster, I guess.
2. "She'd be pissed if she found out." Presumably the same she, so still Cherry. So Aiken(?) and Erin have a secret from Cherry. And there's some sex going on. Aiken(?) and Erin do appear to have been lovers. Did Cherry not know? Cherry was sexually interested in Erin, wasn't she?
3. "This is where you get off." Erin figures Cherry would indeed be pissed?
4. Adrian is a relatively passive character here. If Aiken(?) was the smirker, that always looked to be because he knew Erin was going to Wilmot before her other friends did. That could have been because she was going under his influence and direction. He has no problem with Adrian. (Although he does appear to have a problem shaving.) Perhaps Adrian is part of his scheme?
It's possible. I get the impression that Aiken seems fairly benevolent, but when there's a woman involved, even nice guys can get into fights...