Not sure what you can do without your Husbands support in this. I personally, would refuse to bring anything like that into the house myself, and say in good conscience I can't buy something for you that I believe to be harmful, but try and ignore that Husband brings chicken nuggets for her. She will be off on her own before long and eat what she likes, all you can do at this point is to continue to lead by example.
Starting Primal June 2012 at 148.5lbs, goal weight in November 2012.
Now 95lbs and holding.
Primal, minus eggs, dairy and a myriad of other allergens.