Just to update this...
Today, I got an email from her owners....
"Hi Veronica
Sorry for not getting back to you things have been hectic here over the past week, anyway I would love for mitzi to come and live with you and your buck, unfortunately it looks like my buck did manage to get her, as she would be due today and has been acting weird and kind of building a nest, however once the kits were weaned if all goes well for her, I would hope that you would still be interested in taking her to her forever home, even if it means waiting a few weeks, you can let me know thanks, and sorry to hear about your loss
Jill xx"
I've replied offering Mitzi a forever home here with Alfie, and that I will wait until her babies are of a suitable age, so she can be seperated from them.
I've also offered her help in finding homes for the babies, via Sara's rescue, in order to ensure good, loving forever homes.