The only thing I would say is that she might want a safe somewhat familiar place to give birth. I am by no means an expert but had a cat I brought back from Mexico (very resilient) didn't know she was pregnant haha had quite a surprise when I went to get her spayed. She had a 7 kittens she decided to do it on my bed (not ideal) but it was at the bottom where she often slept. All 7 were healthy cats. One kittens one eye didn't open even a couple weeks after all the others has so I gave it a little help just opened with my fingers I definitely am not saying this was the proper thing to do but it worked out for us and we were hours from any sort of vet. Anyway good luck to you and momma they seem to have good natural instincts in my experience.