Yeah, it fits right in line with Phil's lack of creativity, lack of awareness of how he makes things look, need to toss the fuck-up onto someone else, need to feel clever, and lack of caring about anyone but himself. All of his other bullshit stories tick those boxes, too, and there's going to be a reason.
Her lack of presence ever since quitting the streams makes it pretty obvious that much of what we witnessed was from not having a lot of interest to begin with. Given that she used to stream by herself just fine, I have to assume that at some point during those few appearances she realized she had just shacked up with a lying retard and has been embarrassed about it ever since. I do think Phil made her scrub her online presence, but not in the way others put it. It only makes sense that Katherine would've done it on her own, and that the pigroach she married had no say because he's a pussy, and he clearly didn't warn her about the autism vortex. He was NOT thinking about the effect that being associated with him was going to have on Katherine's well-being in the least, he never fucking does. Not to mention, she talked about stuff that poked holes in his "I don't make much money" narrative, so he didn't inform her about that, either, even though you would think he would.
Not saying she's brilliant, just that she's less dumb than Phil needs her to be, else it would be a lot more obvious that she still lives there and is happily married to him.