Can someone please explain the context for this scene in L'heure Simenon?
 

Specifically, it's number 290 on this list: https://forum.oneclickchicks.com/show...hlight=simenon

I find the scene very intriguing, but my French is pretty terrible and I can't find any plot summaries, so I can't figure out what's going on or why. If anyone who's watched the show can fill me in, that would be much appreciated.