@ Lion.
The mom will interfere with the sack in numerous issues like loud noise, light, isopods, light, too much movement around her enclosure, temperature, humidity, mold on the sack, clumped and ehgs rhat go under embryonic diapause etc so why do u think zoos and breeders use incubators? Not for just a nice ornament and look pretty lol. I've use plenty and they make a world of difference in a controlled environment