Wow, that's new. Christopher raised an eyebrow at the sudden change of atmosphere as he leveled a steady, blank gaze upon Parvati. The thing was that Christopher was not deliberately trying to be difficult or unkind- well, maybe he was being difficult on purpose- but he never took it well when he was being pushed around (or in this case, verbally coerced). Of course he would bring it up to Sally Ann when he got home, because Christopher was nothing if not reasonable. If she was interested, he was sure they could work something out and compromise. He did not really want to go, to be honest, so perhaps they can leave early or something like that. He would rather it be a compromised consensus and be semi happy than to be completely miserable in something else.
"I apologize, Parvati, if I had offended you. Of course you do not need your husband's approval to do anything," and that was completely sincere, "To be honest, which I guess I should have been in the beginning, I'm not too keen on the idea, but that is just because I am not particularly skilled at social interactions. If Sally Ann wants to go, however, we can work something out, I'm sure."
Christopher knew that if his attempt at damage control was not successful, no doubt this would eventually reach Draco Malfoy (although, if Parvati did that, wouldn't it defeat the purpose of her entire speech? Christopher decided he should not bring that up). To be perfectly frank, Christopher was not afraid of Malfoy, despite all the money and the status (was he going to use all those big guns just because Christopher did not share the same social interest as his wife? A little petty, yeah). The guy was still human, after all.
Yes, Christopher understood that Parvati was probably used to getting what she wanted (and he acknowledged the bias on his part because, really, he did not know Parvati all that well), and that just clashed with Christopher, who had the same pureblood stigma as the Malfoys, but lacked the financial backing. Sometimes, he wished he was not a pureblood, just so he can stop worrying about things like reputation, and image, and focus on providing a good life for his wife.