One of the forums is
TeachSoap. Unfortunately, it's been inactive for about 8 years and you'd need to register to easily see her profile and posts. Registrations seem to no longer work. She went by Lhangen and BBadict. BBadict in itself is telling because it's misspelled, a soap thing, and also a pun on Bareback Addict. I don't know what the Sims forum was, but I believe the post where she whined about not getting enough was from there. She was getting banned for overly sexual content, while being pissed off at Phil and making very public passes at him, while I can't find the smoking gun, I'm pretty sure it's easy enough to put two and two together. And because she was pretty much a teenager still, she wasn't smart enough to keep her mouth shut about the whole thing, which in turn greatly annoyed Phil, who wanted her completely separate from his content.
Phil has described her as "Having a big personality" years after the fact, and has pretty much admitted that he felt emasculated as hell whenever she was around. "People liked her coming on stream and confronting me" roughly paraphrased.
As a bonus, here's a pic of Panda claiming that DSP is NOT a pedophile. That is all. Relevant to the Jidion thing lately I suppose. Phil should really watch his ass with that. The Panda content is not as lost and inaccessible as he thinks it is.
As for him having fucked Panda, I mean... Sure, if we're being generous, I guess rubbing a Mandingo-powered half chub against her thigh kinda sorta counts. I think they tried once or twice, Phil didn't perform, and they just stopped. Their sex life dying after they moved in together probably means Phil was able to do sexting/cam sessions but not the real stuff. By the time they went to Washington, they were both in too deep. Phil only wanted a live-in maid to cook and clean. Panda wanted a youtube star boyfriend who would pay the bills and pay the costs to set up her soap business. They probably met IRL, tried once, Phil made excuses about how it never happens and he'd totally rock her world next time, and she just went with it because of the sunk cost fallacy. There may have been more attempts, and they did share a bed, but I don't think it happened very often.
Don't get me wrong, under normal circumstances I would 100% agree that a couple living alone, specially if the guy's significantly older are absolutely fucking, at least in modest numbers when time and place allows. If Peetz and Chantal were fucking, even if it was super weird degen shit, the bar's not too high to clear. It's just that Phil still doesn't clear it.
And I don't think Phil's even used the no load loser thing before Quartering asked him "Where'd the load go?" in the softball interview. And the Incident looked like a struggle, as has been pointed out.