Warded
Sometimes people just don't get along. Maybe you should let it be. I should definitely let it be, because neither one knows me or cares about what I think.
I've worked with Narcissa for years, so I know full well how she is. I don't mind. In fact, I've worked with plenty of pureblood families so I do understand the situation.
Also you do know that disowning doesn't really mean what they think it means, right? I mean I can give you a whole lecture, but the bottom line is that you are a Black, both legally and with the impact you have on the family. Not that I'm saying that you have to behave a certain way, but pureblood disowning is more a show than anything else. Then again most high societies, muggle or wizarding, are more interested in the appearances of things than the realities of things.
I won't ignore Narcissa because I work with her, but I can still be me. I've done it for years.
Don't worry about me. I can handle your family and any pureblood that comes this way.