If it's not a very long holiday then she stays at home. We usually make sure there's enough in the house for her to be comfortable and some cash for grocery / emergency. We (she and I) usually draw a list of work that she could do, which are not always possible with everyday work - like put curtain for a wash, clean the windows.
Plus depending on the work above, we give her some days "off" completely. So in case we request her to work on one of the sundays etc, it can be adjusted with these. This is all in agreement with her.
In case it's a very long holiday, she also takes her annual leave and comes back a day or so before we return.