It really sounds as if she just wants you and your family to be able to find a way to spend the holidays with them. Since she doesn't sound mean spirited I'd take it in a loving but clueless way but definitely do whatever you need to do to keep yourself healthy.

FWIW I have been alone on holidays when I didn't feel well and it was a welcome hiatus. Everyone else got to enjoy the festivities elsewhere and I was permitted to rest at home in peace. Might not be a bad compromise.