You don't want to bump the humidity up so high in a brooding female's enclosure. From the little experience I've had with this, you don't want humidity dropping below 60% and you don't want it climbing much higher than 80%. Keeping things so wet in an enclosure can cause problems with your female, like bacterial infections and belly rot.
The female can regulate the humidity within her coils as long as her enclosure's humidity isn't too high or too low. If she feels that the humidity is low, she may leave her clutch to soak in her water bowl before returning or she could urinate in her nest and get the same effect, boosting the humidity within her coils. Too much keeper interference can cause problems. All you need to do is provide a gravid female with the same conditions you'd be providing any other ball (conditions that encourage intact sheds, healthy appetite and normal behavior) and she can do the rest. You just keep tabs on her, provide clean drinking water, and offer food periodically. The only difference being that she'll be guarding a pile of eggs so you shouldn't be removing her from her enclosure unless absolutely necessary - this because she'll likely be moody and you don't want to make her feel that her nest is unsafe and abandon her clutch.