Order.
The Averys aren’t going to attack a Purist Pureblood family, the Death Eaters need all the support they can get.
She needs to stop being involved, even tangentially, in anything the Order does, while she’s connected to Dante. Especially if she refuses to leave him or the country.
I would recommend also checking anything she’s had access to for bugs or spyware or anything she could use to spy on you. As well as the Imperius testing.