Thing is, everyone is focusing on the wrong aspect of this chapter. Mei has finally accepted her feelings for Yuzu and is (on her own clumsy way) acting on them, Matsuri on the other hand is way over her head since the bond between Yuzu and Mei has proved to be more solid and true that any other bond she severed before (you can see she's breaking down when confronting Mei) and so, I'm sure her plan will backfire on her pretty badly.
And again, is pretty odd to have everyone so worked out over this, just take it easy and wait until this story arc is finished.