I have a black widow who has laid two sacs, I dont know when the first was laid as it was with her when she was shipped, but the second was laid on Sunday. The first one has turned a bit darker and has developed a dent in it. Is this indicative that babies will be here any day? Should I cut the sac? Should I be misting for humidity at all? This is my first experience with any egg sac. This is the sac in the original container she was shipped it prior to me moving it.