I have experienced this myself. Sometimes it's hard to discern between paranoia and red flags because of all the scenarios you see here. I don't really know what to tell you about how to fix it except to take a break after you've gotten the bulk of what you need from TAM. Many members have such a hard time NOT reading that they ask for bans from the moderators.My reason for posting all of this was partly for my own catharsis, and partly to find out what I can do to break this habit of spending 7 hours a day reading these forums. It's only making me suspicious, eating up my work time, and is hurting my emotional help. The bulk of the porn I've been watching the past few months has been "cheating" themed. I'm experiencing an unhealthy obsession.
You are wise to assume more happened than you know about. The 'pool party' and the 'campfire' both involved more and likely more egregious activities than you have evidence of. It's virtually an impossibility that they didn't, that's not how adult sexual relationships work. Short of an attack of conscience (I wouldn't hold my breath, she didn't admit to anything until caught), a lie detector test may be your only option giving you a parking lot confession or useful info. You have to be careful with that as well and make sure that the administrator words the questions in a way that you will be satisfied with the answers whether good or bad.
I think I might try to pressure the VP or team she was let go from with the threat of 'bad press' if they don't divulge the facts of her release. This might be a non-starter though.
What is her job now?