No, Charles-Henri, you have way too many sisters and brothers to just stop Sansons from existing :C I like the change in him, I like how it's motivated, but what's the plan exactly, besides not taking a wife? Because he's being a professional, an impressive heir to his dad right now. It doesn't do any harm to their family business.
Also, I'm always having a little chill, when they reveal a fate of characters we meet. It doesn't count as a spoiler, it excites me a bit instead.