Even I heard about this, and I avoid NTR like the diseased filth it is. This is all secondhand, but I heard the NTR was complete bullshit forced by the author the same way she always forces her NTR. It was lazy, poorly done, and completely out of character. She was apparently desperate to do it for months by that point and nagged her editor the entire time until he gave in.
Both Japan and the West criticized her severely for the NTR and she went psycho trying to suppress criticism, even deleting comments on the official page. Rather than retcon it as a bad dream or something, she doubled down and wrote another chapter where she said the MC (and the readers) deserve to get NTR'd and are all nothing but losers. Then she got her series cancelled, so in the very last chapter she has the MC pimp the girls in JAV.
Again, secondhand, but figured you would find that handy.