No, don't think so. I think she's just और of an extremely dedicated supporter and with her Husband, Son and Sister being Death Eaters, she's a useful extra for Voldemort to have on side.
No, she's not. She just happens to be the wife and mother and sister of Death-Eaters. It also happens that she shelters the Dark Lord in her घर - which may explain that she's present at the Death-Eater meeting in DH. Besides, she may not be a Death-Eater, that doesn't prevent her to have the prejudices of her group...
No, I don't think so. Her husband, sister, and son were Death Eaters so she originally supported the Death Eater cause. But I don't think she was a Death Eater herself.
I don't think she is because we never get a mention of her Dark Mark या her interacting closely with Voldemort.
She also seems to be somewhat against Voldemort's agenda (at least when her own family is involved) and if she were a Death Eater I think Voldemort would've kept a closer eye on her and noticed her reluctance.
no she definitely wasnt! she never tries to summon the dark lord with the mark and come on they are not a death eater family. maybe her husband and son are and thats why she is in contact with the other death eaters.
she goes against the dark lord द्वारा saying snape about draco's mission and making the unbreakable vow. remember - bellatrix mentions that the dark lord will be furious but narcissa does not care at all!
she actually saves harry inorder to save her son - and there आप go! real death eaters will never lie to the Dark lord या wont defy him. so if she had that much loyalty to him as a death eater, she would not have lied to him! so definitely NO.
I don't think so, I mean there's no real proof. I think she's just there for her husband, her sister and Draco. Plus they stay in the house she lives in so. But she could be and they just never really tell आप about it.