If she only wants to view TV and not record then you could get a secondhand SKY box and put a FreeSatFromSKY card in it. Following is a quote from
http://www.sky.com/shop/freesat/home/faq/
I already have Sky digital satellite equipment - what else do I need?
All you need to gain access to the free channels available on the digital satellite platform is a Freesat from Sky viewing card, which costs just £25. If you’d like to access the interactive services available, you’ll also need a working phone line. To purchase a viewing card please phone Sky on 08448 244 400.
I've been using one for years on a secondhand SKY dish (which I installed and it hasn't moved!). I do also have a Freeview PVR box.
There are plenty of Free-to-Air channels available on SKY without a FreeSatFromSKY card, but you need the card to set the region and to a few extra channels that are not Free to View without it!