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Ha-ha! Nah, I don't think so. Doesn't look like her... :-)

guarantee you it's them, but in their old age. that puts the photo around the 1920's-30's :3

Well, if it is Pierre and Marie, it might be a previously unknown photo of them. Because I can't find any where they look similar to that...

maybe. it's my best guess, anyway. their appearance matches.