She ever so slightly misunderstood why he went speechless and blushed. She didn't seem to mind the misunderstanding at all, though.
I hope Yuzu is merely exhausted or about to catch a cold, nothing more serious. If memory serves, she suffered a head trauma back then, so there's a reason to worry whenever she might be feeling dizzy. Although she did give birth successfully, so she should be free of any such old wounds, lest the stress of childbirth would have killed her.