...and even if there was a "technically and legally (!)' possible way..I would not put my family at risk. Travelling is still full of risks. Her parents must have already a certain age, in which Covid can be heavy.
I live in Italy as Expat also...missing to see family and friends as usual before the pandemic...but i have even prefered to be the first time in my life without my parents for christmas. And now, if alll goes well, we see releases coming , in summer...
By the way , friends have rented a couple of years ago a flat of Gs family in Scandicci. His mother was managing professionally friendly. All their properties are not in an "A" location...pretty much remote. Difficult to attract to affluent clients...
There are too many awesome historical place in Tuscany, with views, with wine, with oil . Many offering cooking, gardening, language.....classes. To maintain the properties is extremely expensive here. Taxes, heating...costs a fortune