As we are so close to the last episode of "Keeping Faith" (which is the English version of "Un Bore Mercher", may I politely suggest that we all refrain from explaining the very last scene of "Un Bore Mercher" ), until we've all had chance to watch the last episode of "Keeping Faith".
(I suspect it might also answer some of your confusion @lynwen-harrington).
I speak as one who was pleasurably confused by " Un Bore Mercher", and who continues to be pleasurably confused by "Keeping Faith". It's part of the fun of watching it. ).