It can only be gravid if either you mated it, or you bought as a WC from the pet store/breeder about a month or 2 ago. If its been longer than that, or its moulted since then, then it's probably just getting fat. Its hard to tell from those pictures but it just looks well fed, usually when theyre gravid the bulge is more obvious. Ive had alot of WC female scorpions who i, and even the breeders who sold it to me thought were gravid but ended up just being fat, it's hard to tell sometimes unless they're heavily gravid then it becomes more obvious.
But if shes WC and bought recently then be cautious and feed her regularly, she will eat like a pig if she's gravid, maybe move up to weekly feedings.
No prep needed apart from keeping her well fed, when she finally does give birth (which can take upto 12 months) she will give birth to live young which will ride on her back for the first few moults, at that point you have to take extra care to minimise disturbing them, scorpions have a tendency to eat their young when stressed.