I'm sorry if the title's triggering.
This was quite a few years ago.
The parents were telling the story from their pov, "by this time we were seeing dd much less often but we were worried", " if we went round to see her, he would make an excuse that she was busy" etc kind of thing. It was excruciating detail, and absolutely horrifying.
When I say some years ago, it could have been as many as 15, but no less than, say, 7 (almost certainly more).