He wasn't shocked, wasn't even surprised, at Hanna's statement. Honestly, he was surprised that Draco's wards had allowed him through at all. If their positions had been reversed (and if he had any say over Theo's own wards), Draco would be barred after the vitriol they spewed at each other those weeks ago. Instead of saying what he wanted to say (that the blonde prat could get over himself and kick Blaise out on his own if that's what he wanted) he addressed Hanna in the most polite tone he could muster.