"The Vaiseys make themselves look poorly, there's no reason for us to do the same." If they had kept a better watch over their son they wouldn't have had the problems they did - Pansy found more to blame in how the whole situation had been handled than in anything Cass had done - he couldn't help the mistakes of his father. Disowned or not, a death was not something to celebrate.
She nodded when Theo agreed with her, there were several reasons why attending the funeral might be a bad idea, but overall not going would be the worst of their options. "I imagine there will be many more of these funerals over the next several months." Charlotte's had been only the beginning, Pansy wasn't a stupid woman, she knew people died when Voldemort was left to run about the country. And it would be all the more difficult to stop herself from thinking about her daughter with each new funeral.