Yeah I corrected my original post, I misread it as a recent thing possibly influenced by dementia.
There's no way this happened back in 2012, Chris is spewing some bullshit.
I don't think it happened as described, but I do think she might have said something that came across that way through his tarded mind. Their relationship is warped, and I have no doubt she also said some disturbing things.
There is no way a mental retard gets the idea of hopping on his mom without some seriously Gothic family shit going on.
Also there are some serious implications about Chris's claim even though it probably didn't happen exactly as he said it did. And also suggestions that it obviously didn't happen as he said it did.
The first assumption, pretty obvious, is that he immediately admitted to his mother that he'd seen a prostitute. Otherwise, how could she react to that admission? This is pretty standard Chris, without anything resembling a filter. However, lacking that filter, he didn't immediately admit to it publicly that Barb had said this, and he would have if it had happened the way he's claiming now, because he's Chris.
If not, he would have admitted it to someone else who immediately would have rushed off to grab their Internet clout.
So my guess is she said something suggestive and weird at some point, Chris didn't consider it meaningful, and he dragged it up out of his failing memory and then warped it to justify his current bullshit.
Chris reminds me a little of Benjy from "The Sound and the Fury".
Incidentally, that's exactly who I was thinking of. Or Vardaman from As I Lay Dying. If he was an adult but with Vardaman's mind.
If Faulkner had a specific prose skill it was portraying what it would be like to be inside a broken mind.