He chuckled too. She was lovely when she blushed, but there was something hesitant about her. Viktor hoped he hadn't overstepped his bounds; he felt rusty and out of practice, talking to a pretty woman he didn't know. He didn't aim on flirting precisely, as he wasn't even sure he should anymore, with two kids in his care. "Ah, I am doubting it is as bad as all that, but I will have to believe you, as I cannot call you a liar." No, one never called a lady a liar, his mother would kill him to think otherwise.
"Ah well, Karkaroff vas not the sort for high tea, and neither much are my Quidditch friends." Hermione, perhaps, but she was so busy, and there was, of course, Ron, as always, making inviting her out often unwise for all involved. He was sure his ex would probably have loved the attention a high tea would bring, but Viktor would be in it for an experience. "I vill add it to my list of things to do, then, especially if Tsveta keeps up with her current fancy." He would do anything for his girl.
"Vell, I can tell you she vill be over the moon, and I cannot thank you enough in advance for that. She is not always easy to please." Though easier than some, he supposed. Children would be children.