Status Updates From Arsene Lupin, Gentleman-Thief

I saw the twist coming, but I don't know if it's because I know how stories work or because of this specific story's flaws. I do know that the red herring - the first letter of his name - turning out to be a total lie didn't feel quite satisfactory.

Could've been the woman, too. I know enough of the character to know that wouldn't be it, but it'd have been a nicer twist. His grandson could've pulled it off...