This is a very short (253 big-paged) book, although it took me several days to read, but I was in transit all the time, so maybe I missed something? Like Alain Renais's 2008 film (Les Herbes folles) of the novel, is what follows in the world of fantasy? The married Georges seems to have a thing for Marguerite, who tries to shrug the much older guy off, but then there's a 'rebondissement' and she seems to have a thing for him. Yeah? Maybe I oughta re-read this, although I think I'll see the same story: Christian Gailly is weird stuff.
My other posts on Christian Gailly:
Christian Gailly: Un soir au club
Christian Gailly: Lily et Braine