How does Mr. Bounderby’s reaction to Mrs. Sparsit’s actions defy social conventions of that time?

What actions are you referring to? She is deffinately out to undermine and destroy Mr. Bounderby’s marriage and to catch Louisa in some sordid act of adultery. I just need to know what actions you are referring to. 

I'm not sure if you'll see this, but I have no idea. That was exactly my problem as well! I know that the question is for the Book the Third, so I was thinking it may have possibly been about how she brought his mom into his house and thereby caused everybody to figure out about his not so harsh childhood, and then he fired her. But how would that defy social conventions of that time? @Aslan