He was going to run. Hell, he was going to run. He couldn't, he could run, she wouldn't let him. Not now that she wanted to help him for Merlin's sake! He was tensed, coiled, coiled like a snake that was about the strike or flee. But Albus wouldn't strike, he was too smart to try that here, or against her.
If she wanted him to stay, she only had a few options. Grab him, a spell, or a threat; violence was the first option. But Katrina-Carlotta didn't want Ablus to feel threatened, having him hate her would be counter productive. So he needed to stay of his own free will, option two, fascinate him. It worked on her well enough, and judging by the book the two had been discussing just moments ago, Albus had a good mind.
"I knew you'd run, I told myself that there was a chance you wouldn't but here you are, fleeing like a little snake," her voice was soft, but loud enough, her words hadn't been designed to insult, but she supposed they might. "You are a snake, aren't you? Everyone says you're just a polite young man, but you're more than that. You know it, I know it, everyone could know it if you wished. But you don't, why?" the woman paused to collect her thoughts. "And why are you scared? Most people are scared of me, but you're intelligent enough to know that if I wanted to kill you that you would be dead by now. So why are you still afraid?" the woman asked the last sentence slowly, curiously, wanting an answer.
But then she thought of all the politicians who would only meet her in certain locations, or the people who would wear glamours while speaking to her so their reputations wouldn't take a blow. Sighing softly the dark witch met Albus Potter's eyes, having stood up at some point in an attempt to not let him get away, "it's always about the reputation isn't it?"
She pulled out her wand, and murmured a string of well-practiced words quickly with the wood pointed at her own face, which became pointy and much less tanned. "Now how about we go into a booth, draw the curtain so you don't have to worry about your precious reputation, and continue what was a completely civil discussion?" Katrina-Carlotta suggested, her tone clipped, but not threatening.