This isn't the first time we've rescued a pregnant Momma... the first one, we rescued before Xmas & was pregnant... she had her litter on Xmas day, on my daughter's bed (top bunk). Grody.
One was all white and developed light grey ear & tails from 3-8wks of age, so now we know the Momma cat had some siam/burmese background. of course, we kept that kitten, she was gorgeous. And we named her Christmas!
This one is curled up under my dresser... I got a towel underneath her. We got her a birthing box but she had no interest in it; why would she when she could ruin our white carpet instead! NOT keeping any kittens from this litter, and I think we're over the rescuing/spaying/neutering/rehoming kick, too!