Huh, okay, on re-read I can see that interpretation! And it does make it make a lot of sense without requiring excessive amounts of slashy. (Although it requires Javert to be doing a very bad job of interrogating Marius, because it means that a) Javert knows all about Thenardier and knows where he lives, and b) doesn't think to ask Marius if he knows anything about his neighbor, thus revealing that the Jondrette with the daughters is the neighbor. But I guess I guess many things can be explained just by "Pontmercy".)