The way that wound was described, the most likely outcome for him is that he ends up with a below knee amputation. Nowadays that limb could be salvaged, and be reasonably functional but would take a lot of work. What actually happens depends on what the doctors find when they get in there - arteries cut or not, nerve gone, how much muscle is missing and where. This is just my medical opinion based on experience and the brief description here. If he is lucky and the leg is not as bad as I think he will still need a surgery or three and will be out of the fight for months. He is simply not "valuable" enough to be evacuated to Australia, but once he is stable hopefully he, and other Filipinos who are in recovery mode can be evacuated to another island and blend in with the locals, perhaps eventually to join guerillas.
As far as Ann-Marie goes, now that she has been identified as a collaborator by a local (Parisian) resistance group the clock is ticking. Killing a German soldier or civilian administrator will bring down all sorts of heat the resistance wants to avoid. The murder of a French civilian, well not so much. Making sure the murder looks like a street crime, purse missing, any jewelry gone, maybe coat and shoes gone (rationing you know) and this is a job for the local flics. Maybe they will try harder due to German pressure, but "M'sieu, times are hard, she was in an area where those who are well fed and well dressed are targets. Nous sommes desolés, but we cannot find the perpetrator." There won't be a placard pinned to her body, but the whisper campaign will begin - those who collaborate will pay.